San Francisco Bay A Richmond-san Rafael Bridge, California water temperature
San Francisco Bay A Richmond-san Rafael Bridge, California · Sea/Coast
The current water temperature at San Francisco Bay A Richmond-san Rafael Bridge is 19.0 °C (as of September 20, 2026, source: USGS).
The sea lags the air by weeks: the warmest water often arrives after the warmest days. Measured buoy values show this honestly.
Measurement series & statistics
This measurement series includes 410 data points since July 22, 2026.
Lowest recorded value: 16.8 °C on August 8, 2026 · highest value: 20.7 °C on July 26, 2026.
In September, temperatures have ranged between 17.0 °C and 19.6 °C.
The current value is 0.8 °C above the September average of this series.
Nearby waters
Frequently asked questions
Can you swim at San Francisco Bay A Richmond-san Rafael Bridge right now?
The current water temperature is 19.0 °C. See live swimming conditions, weather and quality in the BrrChecker app.
How warm is the water at San Francisco Bay A Richmond-san Rafael Bridge?
Currently 19.0 °C (updated continuously).
How warm is at San Francisco Bay A Richmond-san Rafael Bridge in September?
In September, the water temperature recently averaged 18.2 °C.
When is the water warmest at San Francisco Bay A Richmond-san Rafael Bridge?
Across the measurement record, July is on average the warmest month (18.7 °C).
