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Marine Weather APIs

Marine weather APIs cover waves, swell, tides, currents and sea temperature. Open-Meteo Marine Weather API returns hourly wave and current forecasts without a key, and NOAA CO-OPS Tides & Currents serves US station predictions and observed water levels going back decades. Storm Glass blends national models for waves and wind, WorldTides is a paid source for tide times on any coast, and Environment Canada's MSC GeoMet adds Canadian marine forecasts. Free Weather APIs →
9 listings
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APIPricingAuthFormatFree tierStatus
EuskalmetBasque Country weather forecasts, station readings, ocean and tide data from the regional met agency.
Weather & Environment › Weather Forecasts
FreeAPI keyJSONUnlimitedLive
Foreca Weather APIGlobal point weather forecasts plus air quality, pollen, marine and ski-resort conditions.
Weather & Environment › Weather Forecasts
FreemiumAPI keyJSON1k–10k/dayUntested
Meteorologisk InstituttNorway's national weather service: global forecasts plus Nordic marine, aviation and nowcast data.
Weather & Environment › Weather Forecasts
FreeNoneJSONUnlimitedLive
MSC GeoMet OGC API (Environment Canada)Canadian weather alerts as GeoJSON polygons, plus marine forecasts, river levels and climate records.
Weather & Environment › Natural Disasters
FreeNoneJSONUnlimitedLive
NOAA CO-OPS Tides & CurrentsTide predictions, observed water levels, currents and coastal weather from NOAA stations, back decades.
Weather & Environment › Weather Forecasts
NoneJSONUnlimitedLive
Open-Meteo Marine Weather APIHourly wave height, swell, sea temperature, ocean currents and tide-inclusive sea level forecasts, no key.
Weather & Environment › Weather Forecasts
FreemiumNoneJSON10k+/dayLive
Storm GlassMarine and weather forecasts (waves, tides, wind, temperature) blended from multiple national models.
Weather & Environment › Weather Forecasts
FreemiumAPI keyJSON<100/dayLive
WeatherAPICurrent weather, 14-day forecasts, history from 2010, alerts, marine, astronomy and IP lookup.
Weather & Environment › Weather Forecasts
FreemiumAPI keyJSON1k–10k/dayLive
WorldTidesHigh and low tide times, tide heights and datums for any coastal coordinate, from harmonic station data.
Weather & Environment › Weather Forecasts
PaidAPI keyJSON—Live

Choosing a Marine Weather API

Is there a free Marine Weather API?

Yes. Euskalmet, Meteorologisk Institutt and MSC GeoMet OGC API (Environment Canada) are free to use, and Open-Meteo Marine Weather API, Storm Glass, Foreca Weather API and WeatherAPI have a free tier alongside paid plans. See all free Weather APIs.

Which Marine Weather APIs work without an API key?

Open-Meteo Marine Weather API, NOAA CO-OPS Tides & Currents, Meteorologisk Institutt and MSC GeoMet OGC API (Environment Canada) need no key or sign-up, so you can try them with a plain request.

Can I call a Marine Weather API from front-end JavaScript?

Open-Meteo Marine Weather API, NOAA CO-OPS Tides & Currents, Meteorologisk Institutt and MSC GeoMet OGC API (Environment Canada) allow cross-origin requests and need no key, so they work straight from the browser. For the others, call them from your server so your key stays private.

Can I use Marine Weather APIs in a commercial project?

NOAA CO-OPS Tides & Currents, Euskalmet, Meteorologisk Institutt, MSC GeoMet OGC API (Environment Canada), WeatherAPI and 1 other permit commercial use. Open-Meteo Marine Weather API, Storm Glass and Foreca Weather API restrict it, for example to non-commercial or attributed use, so read the terms first.

Which Marine Weather APIs work with AI agents?

Storm Glass, MSC GeoMet OGC API (Environment Canada) and WeatherAPI publish an OpenAPI spec for generating clients and tools.

Broader: Weather Forecasts APIs · Weather & Environment APIs

More in Weather Forecasts: Historical Weather APIs · Weather Alerts APIs · Weather Radar APIs