NOAA CO-OPS Tides & Currents
LiveLast verified 28 Sept 2026
Tide predictions, observed water levels, currents and coastal weather from NOAA stations, back decades.
Example request
curl -s 'https://api.tidesandcurrents.noaa.gov/api/prod/datagetter?begin_date=20200101&end_date=20201231&station=8518750&product=hourly_height&datum=MLLW&time_zone=lst&units=metric&application=DataAPI_Sample&format=json'
Free tier, in plain English
No key needed. NOAA throttles very heavy callers without publishing a figure, and limits how much data one request can return.
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