Perigee Tides & Conditions helps people find NOAA tide-prediction stations and check near-term coastal outing windows for fishing, boating, paddling, beachcombing, photography, and coastal-living checks. For a selected station, activity, local date, and time within seven days, it combines available tide predictions, NWS wind forecasts, daylight and moon calculations, and NOAA water observations into a planning state, recommended window, confidence, reasons, cautions, freshness, and provider attribution. Coverage is limited to NOAA CO-OPS U.S. and territory tide-prediction stations, and data availability varies by station. It is a planning aid—not navigation, emergency guidance, a comprehensive weather forecast, route clearance, or a safety verdict.
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MCP connect URL: https://perigeetides.com/mcp
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Explore capabilities (26)
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Noaa18
Astro Get5
Nws Get2
Get Observed Water Levels
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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 in requested time zone), v (height), s (sigma), f (quality flags, decoded in output), q (p=prelimin
Description may be truncated on the public preview.
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=prelimin
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, M
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
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_de
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_Maj
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What is the Perigee Tides & Conditions MCP server?
Perigee Tides & Conditions helps people find NOAA tide-prediction stations and check near-term coastal outing windows for fishing, boating, paddling, beachcombing, photography, and coastal-living checks. For a selected station, activity, local date, and time within seven days, it combines available tide predictions, NWS wind forecasts, daylight and moon calculations, and NOAA water observations into a planning state, recommended window, confidence, reasons, cautions, freshness, and provider attribution. Coverage is limited to NOAA CO-OPS U.S. and territory tide-prediction stations, and data availability varies by station. It is a planning aid—not navigation, emergency guidance, a comprehensive weather forecast, route clearance, or a safety verdict.
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Other MCP servers in this category from the directory index
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)
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,
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. (NO
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
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 v
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
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 flo
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
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).
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.
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?".
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-d
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.
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).
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.
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.
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.
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
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
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: Maximu
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