NOAA Tides and Currents
NOAA tides and currents: water levels, tide predictions, currents, met data, flooding, sun and moon
| Endpoint | https://perigeetides.com/mcp (streamable-http) |
|---|---|
| Registry version | 2.1.0 |
| Now | 26 tools · grade C (65) · pin ts_57565abed65bbc63cc426f9bad8dabea · protocol 2025-06-18 |
| First / last listed | 2026-11-11 02:17 UTC / 2026-11-11 02:17 UTC |
| Grade over time | 2026-11-11: C (65), 26 tools |
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Tools: noaa_get_water_levels noaa_get_water_level_summaries noaa_get_tide_predictions noaa_get_currents noaa_get_current_predictions noaa_get_meteorological_data noaa_search_stations noaa_find_nearest_stations noaa_get_station_info noaa_get_station_datums noaa_get_harmonic_constituents noaa_get_prediction_offsets noaa_get_sea_level_trends noaa_get_sea_level_rise_projections noaa_get_extreme_water_levels noaa_get_top_ten_water_levels noaa_get_high_tide_flooding astro_get_moon_phase astro_get_next_moon_phase astro_get_sun_times astro_get_sun_position astro_get_next_sun_event nws_get_wind_forecast nws_get_marine_forecast noaa_get_reference_guide perigee_whoami
noaa_get_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 params: station*, interval, datum, units, time_zone, date, begin_date, end_date, range, response_format |
noaa_get_water_level_summaries | 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 wit params: station*, product*, datum, units, time_zone, date, begin_date, end_date, range, response_format |
noaa_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 params: station*, interval, datum, units, time_zone, date, begin_date, end_date, range, response_format |
noaa_get_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 ( params: station*, bin, expand_detailed, units, time_zone, date, begin_date, end_date, range, response_format |
noaa_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" retur params: station*, bin, interval, vel_type, units, time_zone, date, begin_date, end_date, range, response_format |
noaa_get_meteorological_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 alw params: station*, product*, interval, units, time_zone, date, begin_date, end_date, range, response_format |
noaa_search_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 params: type, name, state, limit, offset, response_format |
noaa_find_nearest_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-le params: latitude*, longitude*, type, limit, max_distance_km, response_format |
noaa_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 dat params: station*, expand, units, response_format |
noaa_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" retu params: station*, epoch, units, response_format |
noaa_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 params: station*, bin, units, response_format |
noaa_get_prediction_offsets | 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 "curre params: station*, kind, response_format |
noaa_get_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, neg params: station, affil, response_format |
noaa_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?" params: station, scenario, projection_year, units, response_format |
noaa_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 s params: station*, units, extremeType, levelType, response_format |
noaa_get_top_ten_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 floodi params: station*, analysis, datum, units, year, response_format |
noaa_get_high_tide_flooding | 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)
- annua params: station*, report, start_date, end_date, year, month, range, season_months, met_year, decade, flood_threshold, response_format |
astro_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 inv params: date, end_date, latitude, longitude, response_format |
astro_get_next_moon_phase | 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). params: phase*, date, count, response_format |
astro_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. params: latitude*, longitude*, date, end_date, timezone, response_format |
astro_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. params: latitude*, longitude*, date, time, response_format |
astro_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. params: event*, latitude*, longitude*, date, count, timezone, response_format |
nws_get_wind_forecast | 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 params: latitude*, longitude*, hours, units, response_format |
nws_get_marine_forecast | 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 params: latitude*, longitude*, response_format |
noaa_get_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 p params: topic* |
perigee_whoami | 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. params: none |
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