Average water temperature in Foster City
On this page you find the mean water temperature over the year in Foster City (California), the United States of America. Get insights into the water temperature fluctuations and discover what they mean for visitors.
Water in Foster City maintains a consistently cool profile. The warmest month, August, has an average temperature of 14°C.
The coldest water temperature month is March, averaging 12°C. These conditions are ideal for enjoying peaceful, less crowded water activities.
Forecast for Foster City (CA)
2 m/s
broken clouds and no rain
4 m/s
overcast and slight rain
5 m/s
broken clouds and slight rain
Interested in more climate information?
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