San Francisco Bay water temperature

San Francisco Bay, China Camp · Sea/Coast

The current water temperature at San Francisco Bay is 19.3 °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.

19.3 °C

Measured: September 1, 2026 · continuously updated

💧 Water 19.3° · ☀️ Air 19.0°

Water quality

Official EPA rating: excellent

Nearby waters

San Francisco Bay, Gallinas Creek · 4.5 km away20.2 °C San Francisco Bay A Richmond-san Rafael Bridge, California · 7.4 km away17.3 °C Pacific, Richmond · 9.7 km away18.7 °C Pacific, Richmond, CA · 9.8 km away18.6 °C Pacific, Tiburon Pier, San Francisco Bay, CA · 12.2 km away16.8 °C

More measuring points: San Francisco Bay

First Mallard20.6 °C Second Mallard20.4 °C Gallinas Creek20.2 °C

Frequently asked questions

Can you swim at San Francisco Bay right now?
The current water temperature is 19.3 °C. See live swimming conditions, weather and quality in the BrrChecker app.

How warm is the water at San Francisco Bay?
Currently 19.3 °C (updated continuously).

How is the water quality at San Francisco Bay?
The official classification is: excellent.

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