Marine Forecast
Check the sea state
Free 7-day marine forecasts for popular harbors, bays, and sounds. Wave height, swell period and direction, and water temperature from the open-meteo Marine model. Check the sea state before you cast off.
The next few days ahead. Want it right now? See live conditions →
San Francisco Bay
Strong tidal currents through the Golden Gate and reliable afternoon wind make the Bay a demanding, rewarding sail. Watch the ebb against a west swell at the mouth.
View forecastCentral CaliforniaMonterey Bay
A deep, protected bay with abundant marine life. Calm mornings give way to a brisk sea breeze; the open end takes the full Pacific swell.
View forecastSouthern CaliforniaSan Diego Bay
Sheltered, year-round cruising water with mild conditions. The harbor mouth opens to a steady Pacific swell and the famous Point Loma kelp beds.
View forecastPacific NorthwestPuget Sound
Protected inland waters with strong tides and cool, often calm conditions. Wind funnels through the passages, so check the forecast before a long crossing.
View forecastMid-AtlanticChesapeake Bay
The largest estuary in the US, sheltered and shallow and ideal for cruising. Summer thunderstorms build fast; afternoon chop can stack up in a southerly.
View forecastNortheastLong Island Sound
A protected tidal estuary between Connecticut and Long Island, gentle in summer, with reliable sea breezes and easy harbor-hopping.
View forecastNew EnglandNarragansett Bay
Newport’s home waters and a sailing mecca. Steady summer sea breezes and protected anchorages with the open Atlantic just past the bay’s mouth.
View forecastGulf FloridaTampa Bay
A large, shallow Gulf estuary with warm water and light morning conditions. Afternoon sea breezes and summer storms are the things to watch.
View forecastAtlantic FloridaBiscayne Bay
Miami’s turquoise playground, protected and warm and busy. Beyond the barrier islands the Atlantic swell and Gulf Stream take over.
View forecastSoutheastCharleston Harbor
A historic Lowcountry harbor where three rivers meet the Atlantic. Strong tides at the jetties; the entrance can get lumpy against an east swell.
View forecastGulf TexasGalveston Bay
A vast, shallow Gulf bay and one of the busiest US ports. Brown water and short chop in a blow; the ship channel demands attention.
View forecastNew EnglandCape Cod Bay
Sheltered by the hook of the Cape, with whale-rich waters and classic New England sailing. Fog and a building northeasterly are the main hazards.
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