# NOAA Tides and Currents (remote · perigeetides.com)

NOAA tides and currents: water levels, tide predictions, currents, met data, flooding, sun and moon

- Trust score: 70/100 (medium)
- Change this week: +4
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-08-03

## Components

- remote · `perigeetides.com`: 70/100 (this document), [markdown](https://verifymcp.io/servers/ryancardin15-noaa-tides-and-currents-mcp/perigeetides.md), [page](https://verifymcp.io/servers/ryancardin15-noaa-tides-and-currents-mcp/perigeetides)
- npm · `@ryancardin/noaa-tides-currents-mcp-server`: 69/100, [markdown](https://verifymcp.io/servers/ryancardin15-noaa-tides-and-currents-mcp/ryancardin-noaa-tides-currents-mcp-server.md), [page](https://verifymcp.io/servers/ryancardin15-noaa-tides-and-currents-mcp/ryancardin-noaa-tides-currents-mcp-server)

## Channel facts

- Endpoint: `https://perigeetides.com/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `2.0.2-remote.1`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-08-03.

- **Endpoint Security**: 63/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - Authorisation not fully verified: no authorisation is required to call this server, and 1 tool(s) never declared a destructiveHint. The MCP spec treats an absent hint as destructive by default, so we cannot call this surface safe.
  - HTTPS is enforced; there's no plaintext access path.
  - The HSTS (Strict-Transport-Security) header is present.
  - DNSSEC check failed: this domain isn't protected by DNSSEC.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 77/100
  - 100% of prompts and resources have a non-trivial description (not blank, and not just the item's name).
  - AI-judged instruction clarity (excellent).
  - Context-footprint check failed: tool/resource definitions use about 9353 tokens (~252/item across 37 items; 26 tools + 11 resources), over budget; trim descriptions and params.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 27/100
  - Stability observed for 8 of 30 days with no destabilising changes; credit accrues until the full window elapses.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Capabilities**: 100/100
  - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.

## Install

### Claude

```bash
claude mcp add --transport http ryancardin15-noaa-tides-and-currents-mcp https://perigeetides.com/mcp
```

### Codex

```toml
[mcp_servers.ryancardin15-noaa-tides-and-currents-mcp]
url = "https://perigeetides.com/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "ryancardin15-noaa-tides-and-currents-mcp": {
      "type": "remote",
      "url": "https://perigeetides.com/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add ryancardin15-noaa-tides-and-currents-mcp --url https://perigeetides.com/mcp --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  ryancardin15-noaa-tides-and-currents-mcp:
    url: "https://perigeetides.com/mcp"
```

### Other

```json
{
  "mcpServers": {
    "ryancardin15-noaa-tides-and-currents-mcp": {
      "type": "http",
      "url": "https://perigeetides.com/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-08-03 (score 70, +1)

No change was recorded against any check on this day. Stability & Change Management went from 23 to 27. That category is still filling its 30-day observation window: 7 days of observed history at the previous scan, 8 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-08-01 (score 69, +1)

No change was recorded against any check on this day. Stability & Change Management went from 17 to 20. That category is still filling its 30-day observation window: 5 days of observed history at the previous scan, 6 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-31 (score 68, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-30 (score 68, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-29 (score 67, +1)

No change was recorded against any check on this day. Stability & Change Management went from 7 to 10. That category is still filling its 30-day observation window: 2 days of observed history at the previous scan, 3 at this one. The score rises as the window fills, whether or not the server changes.

### 2026-07-27 (score 66, +1)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-07-26 (score 65)

First indexed and scored.

## MCP tools (26)

### `noaa_get_water_levels` (~631 tokens)

Get Observed Water Levels

Get observed water levels from a NOAA tide station as a time series.

Choose the interval: "6" = standard 6-minute observations (preliminary or verified, max 31 days per request), "1" = 1-minute preliminary data (max 4 days), "hourly" = verified hourly heights (max 1 year). Heights are relative to the requested datum (MLLW by default — the US nautical chart zero).

Returns per record: t (timestamp in requested time zone), v (height), s (sigma), f (quality flags, decoded in output), q (p=preliminary, v=verified). Recent data is preliminary; verification takes days to weeks.

Use for: "what is the water level right now" (date=latest), storm surge analysis, comparing observed vs predicted tide. Do NOT use for future tides — use noaa_get_tide_predictions.

Input parameters:

- `begin_date` (string): Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
- `date` (string): Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
- `datum` (string): Vertical reference datum for heights. MLLW is the standard chart datum for coastal stations. IGLD and LWD apply to Great Lakes stations ONLY; NAVD/CRD exist only at stations where computed. Check a s…
- `end_date` (string): End date/time. Same formats as begin_date.
- `interval` (string): Observation interval: "6" = 6-minute (standard, 31-day max), "1" = 1-minute preliminary (4-day max), "hourly" = verified hourly heights (1-year max).
- `range` (integer): Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `time_zone` (string): Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `noaa_get_water_level_summaries` (~660 tokens)

Get Water Level Summaries (High/Low, Daily, Monthly)

Get verified summary water-level products from a NOAA station:

\- high_low: each day's observed highs/lows with ty = HH (higher high), H, L, LL (lower low). Max 1 year per request.
\- daily_mean: daily mean levels — GREAT LAKES STATIONS ONLY; NOAA requires local standard time, which this tool applies automatically. Max 10 years.
\- daily_max_min: daily maxima/minima from hourly and 6-minute data with completeness percentages. Max 10 years.
\- monthly_mean: monthly tidal datum means (columns MHHW, MHW, MSL, MTL, MLW, MLLW, DTL, GT, MN, DHQ, DLQ, HWI, LWI, highest, lowest). Max 200 years — ideal for long-term climatology.

Use for: historical extremes, mixed-tide analysis (HH vs H), long-term averages. For raw time series use noaa_get_water_levels; for future tides use noaa_get_tide_predictions.

Input parameters:

- `begin_date` (string): Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
- `date` (string): Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
- `datum` (string): Vertical reference datum for heights. MLLW is the standard chart datum for coastal stations. IGLD and LWD apply to Great Lakes stations ONLY; NAVD/CRD exist only at stations where computed. Check a s…
- `end_date` (string): End date/time. Same formats as begin_date.
- `product` (string, required): Summary product: high_low (daily tide extremes, 1yr max), daily_mean (Great Lakes only, 10yr), daily_max_min (10yr), monthly_mean (datum means, 200yr).
- `range` (integer): Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `time_zone` (string): Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `noaa_get_tide_predictions` (~630 tokens)

Get Tide Predictions

Get NOAA harmonic tide predictions (future or past) for a station.

interval="hilo" (recommended for "when is high/low tide") returns the daily tide events with type H/L — up to 10 years per request. Other intervals (h, 1, 5, 6, 10, 15, 30, 60 minutes) return a height time series — up to 1 year per request.

Heights are relative to the requested datum (MLLW default). Notes:
\- Great Lakes stations have NO tide predictions (lake levels are not tidal).
\- Subordinate stations (type "S") only support interval=hilo; use the station's reference (R) station for interval series.
\- Predictions are astronomical only — they exclude weather effects (storm surge, wind setup). Compare with noaa_get_water_levels for actual conditions.

Input parameters:

- `begin_date` (string): Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
- `date` (string): Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
- `datum` (string): Vertical reference datum for heights. MLLW is the standard chart datum for coastal stations. IGLD and LWD apply to Great Lakes stations ONLY; NAVD/CRD exist only at stations where computed. Check a s…
- `end_date` (string): End date/time. Same formats as begin_date.
- `interval` (string): "hilo" = high/low tide events only (max 10-year span). "h" = hourly, or 1/5/6/10/15/30/60-minute series (max 1-year span).
- `range` (integer): Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `time_zone` (string): Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `noaa_get_currents` (~558 tokens)

Get Observed Currents

Get observed current speed and direction from a NOAA current meter station.

Current stations use alphanumeric IDs (e.g. "cb0102" Chesapeake, "bh0101" Boston Harbor) — NOT the 7-digit water-level station IDs. Find them with noaa_search_stations (type "currents") or noaa_find_nearest_stations.

UNITS WARNING: english = knots, but metric = cm/s (centimeters/second, not m/s).

Returns per record: t (time), s (speed), d (direction, degrees true), b (bin number). Max 7 days per request. Set expand_detailed=true to include per-beam echo intensity and correlation diagnostics.

Input parameters:

- `begin_date` (string): Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
- `bin` (integer): Depth bin number (current meters measure at multiple depths). Find valid bins with noaa_get_station_info (expand ["bins"]). bin=0 returns ALL bins but caps the request at 7 days. Omit at single-bin s…
- `date` (string): Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
- `end_date` (string): End date/time. Same formats as begin_date.
- `expand_detailed` (boolean): Include ADCP beam diagnostics (echo1-4, corr1-4) per record.
- `range` (integer): Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `time_zone` (string): Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `noaa_get_current_predictions` (~635 tokens)

Get Current Predictions

Get predicted tidal currents for a NOAA current prediction station.

interval="max_slack" (recommended for navigation) returns the tidal-current events — maximum flood, maximum ebb, and slack water times — up to 1 year per request. Other intervals (h, 1, 6, 10, 30, 60 minutes) return a velocity time series — up to 31 days.

UNITS WARNING: english = knots; metric = cm/s.

vel_type="speed_dir" returns Speed/Direction pairs; "default" returns velocities projected on the flood/ebb axis (Velocity_Major: positive = flood direction, negative = ebb) with meanFloodDir/meanEbbDir. Subordinate (type "S") prediction stations derive from a reference station — see noaa_get_prediction_offsets.

Input parameters:

- `begin_date` (string): Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
- `bin` (integer): Depth bin number (current meters measure at multiple depths). Find valid bins with noaa_get_station_info (expand ["bins"]). bin=0 returns ALL bins but caps the request at 7 days. Omit at single-bin s…
- `date` (string): Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
- `end_date` (string): End date/time. Same formats as begin_date.
- `interval` (string): "max_slack" = max flood/ebb + slack events (1-year max span); h/1/6/10/30/60 = time series (31-day max span).
- `range` (integer): Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `time_zone` (string): Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…
- `vel_type` (string): "default" = flood/ebb-axis velocity (Velocity_Major signed: + flood, - ebb); "speed_dir" = speed and compass direction.

### `noaa_get_meteorological_data` (~532 tokens)

Get Meteorological & Sensor Data

Get observed meteorological/oceanographic sensor data from a NOAA station.

Products: air_temperature, water_temperature, wind (speed/gust/direction), air_pressure, air_gap (bridge clearance to water surface), conductivity, visibility, humidity, salinity.

Units by system: temps °F/°C; wind knots (english) or m/s (metric); air_gap feet/meters; visibility nautical miles/kilometers; air_pressure always millibars; salinity always PSU. Max span ~31 days per request; interval "6" (6-minute, default) or "h" (hourly).

Not every station has every sensor — check with noaa_get_station_info (expand ["sensors"]). Water-level data is served by noaa_get_water_levels, not this tool.

Input parameters:

- `begin_date` (string): Start date/time. Formats: yyyyMMdd, "yyyyMMdd HH:mm", MM/dd/yyyy, or ISO yyyy-MM-dd[THH:mm].
- `date` (string): Shortcut window: "today" = midnight to now, "latest" = single most recent reading, "recent" = last 72 hours. Mutually exclusive with begin_date/end_date/range.
- `end_date` (string): End date/time. Same formats as begin_date.
- `interval` (string): "6" = 6-minute observations (default), "h" = hourly.
- `product` (string, required): Sensor product to retrieve.
- `range` (integer): Number of hours. With begin_date: hours forward. With end_date: hours back. Alone: hours back from now.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `time_zone` (string): Time zone for timestamps: gmt = UTC, lst = station local standard time (no DST), lst_ldt = station local time with DST. Note: daily_mean data requires lst.
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `noaa_search_stations` (~303 tokens)

Search NOAA Stations

Search the NOAA CO-OPS station directory by capability type, name, and/or state.

Filter with:
\- type: what the station does (waterlevels, tidepredictions, currents, currentpredictions, met, ...) — pick the type matching the data you plan to request.
\- name: case-insensitive substring ("San Francisco", "Boston").
\- state: two-letter code ("CA", "MA").

Returns id, name, location, tide type, Great Lakes flag, and for prediction stations whether they are reference (R, harmonic) or subordinate (S, offset-based — hilo predictions only). Results are paginated (limit/offset). For proximity search by coordinates use noaa_find_nearest_stations instead.

Input parameters:

- `limit` (integer): Maximum stations to return.
- `name` (string): Case-insensitive substring of the station name.
- `offset` (integer): Pagination offset.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `state` (string): Two-letter US state/territory code, e.g. "CA".
- `type` (string): Station capability filter. Common: "waterlevels" (active water level), "tidepredictions", "currents" (observed currents), "currentpredictions", "met" (weather sensors). Full list via noaa_get_referen…

### `noaa_find_nearest_stations` (~293 tokens)

Find Nearest NOAA Stations

Find the NOAA stations closest to a latitude/longitude point, sorted by distance.

Use this to answer "what's the tide station near <place>?" — geocode the place to coordinates first, then call this. Filter by type to match the data you need (e.g. type "tidepredictions" before calling noaa_get_tide_predictions, "currents" before noaa_get_currents — current stations have different IDs than water-level stations).

Distance is computed great-circle (Haversine) and reported in both km and miles. (NOAA's API has no native coordinate search; this tool maintains a cached station directory.)

Input parameters:

- `latitude` (number, required): Latitude in decimal degrees (-90 to 90).
- `limit` (integer): Number of stations to return.
- `longitude` (number, required): Longitude in decimal degrees (-180 to 180).
- `max_distance_km` (number): Optional cutoff radius in kilometers.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `type` (string): Station capability filter. Common: "waterlevels" (active water level), "tidepredictions", "currents" (observed currents), "currentpredictions", "met" (weather sensors). Full list via noaa_get_referen…

### `noaa_get_station_info` (~334 tokens)

Get Station Info

Get a NOAA station's full metadata record: location, state, time zone, tide type, Great Lakes flag, capability flags, and links to available sub-resources.

Optionally expand sub-resources inline via the "expand" list:
\- details (established/removed dates), sensors (installed instruments + elevations), floodlevels (NOS/NWS minor/moderate/major flood thresholds), benchmarks, products (available data page links), notices, disclaimers — for water-level stations
\- bins (ADCP depth bins), deployments — for current stations (alphanumeric IDs)

Use this before requesting data to confirm what the station actually collects. For datum values use noaa_get_station_datums; for harmonic constituents use noaa_get_harmonic_constituents.

Input parameters:

- `expand` (array): Sub-resources to embed inline (availability varies by station type).
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `noaa_get_station_datums` (~388 tokens)

Get Station Datums

Get the accepted tidal datum values for a station: the elevations of MHHW, MHW, MTL, MSL, DTL, MLW, MLLW, STND, NAVD88 (where computed), plus GT (great diurnal range), MN (mean range), LAT/HAT (lowest/highest astronomical tide), and the station's historical extreme min/max water levels with dates.

epoch "current" returns the present National Tidal Datum Epoch (1983–2001) values; "superseded" returns the prior epoch's values (useful for historical comparisons — not all stations have one).

All values share one reference zero (the station datum), so datum-to-datum conversion is subtraction: height_above_MLLW = height_above_MSL + (MSL − MLLW). Use this tool to (1) check which datums a station supports before requesting data, and (2) convert heights between datums.

Input parameters:

- `epoch` (string): "current" = present NTDE (1983–2001); "superseded" = prior epoch values.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `noaa_get_harmonic_constituents` (~338 tokens)

Get Harmonic Constituents

Get the harmonic constituents NOAA uses to compute tide or current predictions at a station — the amplitude, phase, and angular speed of each tidal constituent (M2, S2, N2, K1, O1, ...).

For water-level stations: amplitude (feet/meters), phase_GMT and phase_local (degrees), speed (degrees/hour). For current stations (alphanumeric IDs) constituents are current ellipses (major/minor amplitudes and phases per depth bin — pass bin to filter).

Use for: building custom tide computations, checking a station's dominant constituents (M2 amplitude indicates semidiurnal range), verifying whether a station is harmonically predicted at all. Only reference (R) stations have constituents — subordinate stations use offsets (noaa_get_prediction_offsets).

Input parameters:

- `bin` (integer): For current stations: restrict to one depth bin.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `noaa_get_prediction_offsets` (~300 tokens)

Get Prediction Offsets (Subordinate Stations)

Get the offsets a subordinate (type "S") prediction station applies to its reference station's predictions.

kind "tide": returns refStationId, time offsets for high/low tide (minutes), height offsets for high/low tide, and whether the height adjustment is a ratio (multiplied) or fixed value — this is how NOAA derives subordinate-station tide times from the reference harmonic station.

kind "current": returns refStationId/bin, mean flood/ebb directions, and time adjustments (minutes) for max flood, slack-before-ebb, max ebb, slack-before-flood plus amplitude ratios. Note: current prediction offsets are indexed per bin — pass the station_bin_suffix ID form (e.g. "ACT0091_1") if the plain ID returns nothing.

Reference (R) stations return empty/null offsets — they don't need any.

Input parameters:

- `kind` (string): "tide" = tidepredoffsets; "current" = currentpredictionoffsets.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…

### `noaa_get_sea_level_trends` (~238 tokens)

Get Relative Sea Level Trends

Get the long-term relative sea level trend at a NOAA station: trend and error (reported by NOAA in mm/yr or inches/decade — the payload's trendUnits field says which), the observation period (startDate/endDate), and seasonal amplitude.

Relative sea level combines ocean rise AND local land movement (subsidence/uplift), so trends vary widely by station (e.g. strongly positive on the Gulf Coast, negative in Alaska). Requires a station with a long water-level record; omit station to list all (affil "US" or "Global" filters the network).

Input parameters:

- `affil` (string): Network filter when listing multiple stations.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…

### `noaa_get_sea_level_rise_projections` (~324 tokens)

Get Sea Level Rise Projections

Get NOAA's Interagency Sea Level Rise Scenario projections for a station (from the 2022 technical report): projected relative sea level (meters or feet, see units field) per decade through 2150 under the chosen scenario.

Scenarios: low, intermediate-low, intermediate, intermediate-high, high, extreme, or all. Use for coastal planning questions ("how much sea level rise is projected at X by 2050?"). Pair with noaa_get_sea_level_trends (observed) and noaa_get_high_tide_flooding (flooding impact).

Input parameters:

- `projection_year` (integer): Filter to a single decade year (e.g. 2050).
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `scenario` (string): Emissions/rise scenario from the 2022 Interagency report.
- `station` (string): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `noaa_get_extreme_water_levels` (~294 tokens)

Get Extreme Water Levels

Get NOAA's extreme water level exceedance statistics for a station: the annual exceedance probability levels (e.g. the 1%-annual-chance "100-year" level) and historical extreme events, computed from the station's verified record.

Use for flood risk questions ("what water level has a 1% chance per year at X?"). Levels are relative to the station's datums for the 1983–2001 epoch. Only long-record stations have this product.

Input parameters:

- `extremeType` (string): Extreme statistics basis: annual (default) or monthly extremes.
- `levelType` (string): High extremes (default) or low.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `noaa_get_top_ten_water_levels` (~319 tokens)

Get Top Ten / Peak Water Levels

Get a station's highest recorded water levels: analysis "toptenwaterlevels" returns the ten highest events on record (with date, height, causal event name like "Great New England Hurricane", and category); "peakwaterlevels" returns peak event records (optionally filtered by year).

Heights are relative to the requested datum (MHHW is typical for flood comparisons). Use for "what's the worst flooding ever recorded at X?".

Input parameters:

- `analysis` (string): "toptenwaterlevels" = ten highest on record; "peakwaterlevels" = peak event records.
- `datum` (string): Reference datum for reported heights (MHHW is standard for flood context).
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…
- `year` (integer): For peakwaterlevels: filter to one year.

### `noaa_get_high_tide_flooding` (~527 tokens)

Get High Tide Flooding Data

Get NOAA high tide flooding (HTF, "nuisance"/"sunny day" flooding) statistics for a station. Reports:

\- daily: flood occurrence per day (REQUIRES start_date and end_date, YYYYMMDD)
\- monthly / seasonal / annual: counts of minor/moderate/major flood days per period (filter with year/month/season_months, or range = last N periods)
\- met_year_annual: counts by meteorological year (May–April)
\- annual_outlook: NOAA's projected flood-day outlook for the coming met year
\- projections: decadal flood-day projections through 2100 (filter by decade, flood_threshold)
\- record_days: record flood-day counts
\- likely_scenarios: likely decadal flooding scenarios
\- daily_likelihoods: day-by-day flood likelihood forecasts

Use for: "how often does X flood?", trends in nuisance flooding, future flooding projections. Not all stations have HTF products — check the HTFhistorical flag via noaa_get_station_info.

Input parameters:

- `decade` (integer): Decade for projections/likely_scenarios (e.g. 2050).
- `end_date` (string): YYYYMMDD — required for report "daily".
- `flood_threshold` (string): Flood severity threshold for projections/likely_scenarios.
- `met_year` (integer): Meteorological year (met_year_annual / annual_outlook).
- `month` (integer): Filter to a month (monthly report).
- `range` (integer): Number of years to cover: with year (or met_year) set, returns year..year+range; without, returns the last N years.
- `report` (string): Which HTF report to retrieve (see tool description).
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `season_months` (string): Season for the seasonal report (Dec-Jan-Feb, Mar-Apr-May, ...).
- `start_date` (string): YYYYMMDD — required for report "daily".
- `station` (string, required): Station ID. Water-level/met stations use 7-digit numeric IDs (e.g. "9414290" San Francisco); current stations use alphanumeric IDs (e.g. "cb0102"). Find stations with noaa_search_stations or noaa_fin…
- `year` (integer): Filter to a calendar year (monthly/seasonal/annual/record_days).

### `astro_get_moon_phase` (~208 tokens)

Get Moon Phase

Get the moon phase for a date (or each day of a date range if end_date is given): phase name (New Moon, Waxing Crescent, ...), illuminated fraction, age in days within the 29.53-day cycle, distance (km), apparent diameter (degrees), and waxing/waning.

Tide context: spring tides (largest range) occur just after new and full moons; neap tides after quarter moons. Computed locally — no NOAA data involved.

Input parameters:

- `date` (string): Date in YYYY-MM-DD format. Defaults to today.
- `end_date`: Optional range end (YYYY-MM-DD): returns one entry per day from date through end_date.
- `latitude` (number): Optional latitude for distance/diameter precision.
- `longitude` (number): Longitude in decimal degrees (-180 to 180).
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

### `astro_get_next_moon_phase` (~144 tokens)

Get Next Moon Phase Occurrence

Find the date(s) of the next occurrence(s) of a principal moon phase (New Moon, First Quarter, Full Moon, Last Quarter) from a starting date.

Use for: "when is the next full moon?", planning around spring tides (which follow new/full moons by 1–2 days).

Input parameters:

- `count` (integer): How many occurrences to return.
- `date` (string): Search start date (YYYY-MM-DD). Defaults to today.
- `phase` (string, required): Which principal phase to find.
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

### `astro_get_sun_times` (~213 tokens)

Get Sun Times

Get sunrise, sunset, solar noon, dawn/dusk (civil), nautical dawn/dusk, astronomical dawn/dusk, golden hour, and day length for a location and date (or each day of a range if end_date is given).

Times are ISO UTC unless an IANA timezone is provided. At high latitudes some events may be null (e.g. no astronomical night in summer). Computed locally.

Input parameters:

- `date` (string): Date in YYYY-MM-DD format. Defaults to today.
- `end_date`: Optional range end: one entry per day.
- `latitude` (number, required): Latitude in decimal degrees (-90 to 90).
- `longitude` (number, required): Longitude in decimal degrees (-180 to 180).
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `timezone` (string): IANA timezone for output times (e.g. "America/New_York"). Defaults to UTC ISO timestamps.

### `astro_get_sun_position` (~182 tokens)

Get Sun Position

Get the sun's position for a date, time, and location: azimuth (degrees clockwise from north as rendered here), altitude above the horizon (degrees), plus approximate declination and right ascension.

Use for: shadow/lighting analysis, solar exposure. Computed locally with suncalc; declination/RA are approximate.

Input parameters:

- `date` (string): Date in YYYY-MM-DD format. Defaults to today.
- `latitude` (number, required): Latitude in decimal degrees (-90 to 90).
- `longitude` (number, required): Longitude in decimal degrees (-180 to 180).
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `time` (string): Time of day (HH:MM[:SS], interpreted in the local runtime timezone). Defaults to now.

### `astro_get_next_sun_event` (~218 tokens)

Get Next Sun Event

Find the next occurrence(s) of a sun event (sunrise, sunset, dawn, dusk, solarNoon, night, nightEnd, goldenHourStart, goldenHourEnd, nauticalDawn, nauticalDusk, astronomicalDawn, astronomicalDusk) at a location from a starting date.

Use for: "when is sunset today?", planning golden-hour photography or dawn fishing around tide windows.

Input parameters:

- `count` (integer): How many occurrences to return.
- `date` (string): Search start date. Defaults to today.
- `event` (string, required): Sun event to find.
- `latitude` (number, required): Latitude in decimal degrees (-90 to 90).
- `longitude` (number, required): Longitude in decimal degrees (-180 to 180).
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `timezone` (string): IANA timezone for output times (e.g. "America/New_York"). Defaults to UTC ISO timestamps.

### `nws_get_wind_forecast` (~354 tokens)

Get Wind Forecast (NWS)

Get the NWS hourly wind FORECAST (speed, gust, direction — plus wave height where the grid carries it) for a latitude/longitude.

Data comes from the NWS forecast grid (api.weather.gov gridpoints — numeric NDFD values, not display strings). Horizon is up to ~7 days (156 hours), starting at the current hour. US and territories only. Wave height appears for marine/nearshore gridpoints; swell/period fields are typically only populated for open-ocean points.

Units: english = knots and feet (default), metric = m/s and meters. Direction is degrees true, the direction the wind blows FROM.

This is FORECAST data. For observed (measured) wind at a NOAA station right now, use noaa_get_meteorological_data (product "wind"). For the official marine text forecast (Coastal Waters Forecast narrative with small-craft advisories), use nws_get_marine_forecast.

Input parameters:

- `hours` (integer): Forecast hours to return, starting at the current hour (max 156 ≈ 7 days; the grid may end sooner).
- `latitude` (number, required): Latitude in decimal degrees (-90 to 90).
- `longitude` (number, required): Longitude in decimal degrees (-180 to 180).
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.
- `units` (string): Unit system. english: feet, °F, knots (wind AND currents), nautical miles. metric: meters, °C, m/s for wind but cm/s for currents, kilometers. Air pressure is millibars and salinity is PSU in BOTH sy…

### `nws_get_marine_forecast` (~196 tokens)

Get Marine Text Forecast (NWS)

Get the official NWS Coastal Waters Forecast (CWF) narrative for the marine zone covering a latitude/longitude — day-part wind/seas text ("SE winds 10 to 15 kt... Bay waters choppy"), including Small Craft Advisories.

The point must lie in (or very near) US coastal waters; CWF zones extend roughly 20-60 NM offshore. Returns the zone's segment from the latest bulletin plus the office-wide synopsis.

For numeric hourly wind values use nws_get_wind_forecast; for observed wind at a NOAA station use noaa_get_meteorological_data (product "wind").

Input parameters:

- `latitude` (number, required): Latitude in decimal degrees (-90 to 90).
- `longitude` (number, required): Longitude in decimal degrees (-180 to 180).
- `response_format` (string): Output format: "markdown" for a readable summary table, "json" for the complete structured payload.

### `noaa_get_reference_guide` (~244 tokens)

Get NOAA API Reference Guide

Get curated reference documentation for NOAA CO-OPS concepts and parameters. Topics:

\- products: Every NOAA CO-OPS data product and which tool serves it
\- datums: Vertical datums (MLLW, MSL, IGLD...) and station applicability
\- units: What english vs metric means per measurement (incl. cm/s currents)
\- time_zones: gmt / lst / lst_ldt semantics and restrictions
\- intervals: Valid interval values per product family
\- station_types: Station type filters and station ID formats
\- data_limits: Maximum date-range span per product
\- quality_flags: Data quality fields (v/s/f/q), flag letters, HH/H/L/LL
\- date_formats: Accepted date formats and parameter combinations
\- marine_forecast: NWS wind & marine forecast tools vs CO-OPS observations

Consult this before constructing unusual requests — especially "datums" (which vertical reference to use and station applicability), "units" (english/metric asymmetries like cm/s current speeds), and "data_limits" (maximum date spans per product).

Input parameters:

- `topic` (string, required): Reference topic to retrieve.

### `perigee_whoami` (~79 tokens)

Which Perigee account is this connection using?

Show how this MCP connection is authenticated: the Perigee account it is linked to (if any), how it signed in (OAuth connector or API key), its rate-limit tier, and the requests-per-minute limit. Use when the user asks which account they're connected as, why they're rate limited, or whether their sign-in worked.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/ryancardin15-noaa-tides-and-currents-mcp/perigeetides#diagnostics

## Score history

- 2026-08-03: 70
- 2026-08-02: 69
- 2026-08-01: 69
- 2026-07-31: 68
- 2026-07-30: 68
- 2026-07-29: 67
- 2026-07-28: 66
- 2026-07-27: 66
- 2026-07-26: 65

## Links

- Remote endpoint: https://perigeetides.com/mcp
- Repository: https://github.com/RyanCardin15/Perigee-Tides
- Website: https://perigeetides.com/developers
- Changelog RSS feed: https://verifymcp.io/servers/ryancardin15-noaa-tides-and-currents-mcp/perigeetides/changelog.xml
- Changelog JSON feed: https://verifymcp.io/servers/ryancardin15-noaa-tides-and-currents-mcp/perigeetides/changelog.json
- HTML version of this page: https://verifymcp.io/servers/ryancardin15-noaa-tides-and-currents-mcp/perigeetides