Average monthly water temperature in San Francisco, the United States of America
On this page you find the mean water temperature over the year in San Francisco (California), the United States of America. Discover when the water is at its warmest and coolest, perfect for planning your visit.
In San Francisco, water temperatures remain cool throughout the year. The warmest month is June, with an average water temperature of 14°C (57°F).
The coldest water temperature month is January, with an average temperature of 12°C (54°F). This temperature is not very suitable for swimming.
San Francisco Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in San Francisco - and find the best time to visit.
San Francisco 3-Day Forecast
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full San Francisco climate overview or explore weather in the United States of America.
Popular this month
Where to go in August - average daytime high across popular destinations.
Kissimmee
33°C (91°F) Orlando33°C (91°F) Miami Beach32°C (90°F) Destin32°C (90°F) New York City
29°C (84°F) Big Bear Lake
27°C (81°F) Los Angeles
24°C (75°F) San Francisco22°C (72°F) 
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