San Francisco Bay water temperature

San Francisco Bay, Gallinas Creek · Sea/Coast

The current water temperature at San Francisco Bay is 20.2 °C (as of September 1, 2026, source: NOAA NERRS SWMP).

The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.

20.2 °C

Measured: September 1, 2026 · continuously updated

💧 Water 20.2° · ☀️ Air 19.0°

Nearby waters

San Francisco Bay, China Camp · 4.5 km away19.3 °C San Francisco Bay A Richmond-san Rafael Bridge, California · 10.5 km away17.3 °C Pacific, Richmond, CA · 13.5 km away18.6 °C Pacific, Richmond · 13.6 km away18.7 °C Pacific, Tiburon Pier, San Francisco Bay, CA · 14.8 km away16.8 °C

More measuring points: San Francisco Bay

First Mallard20.6 °C Second Mallard20.4 °C China Camp19.3 °C

Frequently asked questions

Can you swim at San Francisco Bay right now?
The current water temperature is 20.2 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at San Francisco Bay?
Currently 20.2 °C (updated continuously).

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