All data are in degrees Fahrenheit

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Water temperature in San Francisco

Detailed information about the current water temperature in San Francisco. The trend over the last two weeks, daily averages, and precise forecast of the water temperature changes. Gain a deeper understanding of seasonal dynamics with monthly statistical analyses covering recent years.
Sea temperature in San Francisco now

83.6

°F

December 22, 13:50

Trend:

decreasing

Yesterday:

83.6°F

Tomorrow:

83.5°F

Sunrise:

05:50

Sunset:

17:24

Day Length:

11 h. 34 min.

San Francisco in December

Minimum:

79.5°F

Average:

81.4°F

Maximum:

83.0°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 83.6°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 1.1°F higher than the average recorded on this particular day in recent years. The sea temperature remains approximately unchanged from yesterday. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature closely matches the previous two weeks' average, indicating a stable trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 83.6°F on 2020, while the historical minimum was 81.1°F on 2018.

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 83.2°F, the minimum temperature may reach 83.0°F, and the maximum might stay at 83.5°F.

Daily water temperature in San Francisco

Date Current Year

actual* / forecast**

last year 10 years average
Dec 8 84.1°F 83.4°F 83.4°F
Dec 9 83.9°F 83.3°F 83.3°F
Dec 10 83.4°F 83.3°F 83.2°F
Dec 11 83.3°F 83.4°F 83.3°F
Dec 12 83.1°F 83.2°F 83.4°F
Dec 13 83.0°F 84.1°F 83.3°F
Dec 14 83.7°F 83.8°F 83.2°F
Dec 15 83.6°F 83.6°F 83.1°F
Dec 16 83.4°F 83.4°F 83.1°F
Dec 17 83.4°F 83.4°F 83.1°F
Dec 18 83.3°F 83.4°F 82.9°F
Dec 19 83.2°F 83.2°F 82.9°F
Dec 20 83.2°F 83.0°F 82.6°F
Dec 21 83.6°F 83.2°F 82.5°F
Dec 22 83.6°F 83.3°F 82.5°F
Dec 23 83.5°F 83.4°F 82.4°F
Dec 24 83.4°F 83.3°F 82.3°F
Dec 25 83.3°F 83.0°F 82.2°F
Dec 26 83.2°F 82.8°F 82.1°F
Dec 27 83.0°F 82.6°F 82.0°F
Dec 28 83.1°F 82.4°F 82.0°F
Dec 29 83.0°F 82.5°F 82.0°F

* actual - actual temperature values

** forecast - projected values for the next week

Real-time coastal temperatures could deviate by several degrees from the provided readings. These deviations often become evident following intense rainfall or strong winds.

Our forecasting methodology leverages a mathematical model, that uses current water and weather conditions, historical records, wind intensity and direction.

Sea water temperature in San Francisco by month

In San Francisco, the water temperature is comfortable for swimming all year round.
The warmest water in San Francisco was recorded on October 26, 2023, reaching a 87.6°F. While the coldest temperature occurred on January 18, 2015, dipping to 79.0°F. The average readings by season are 81.7°F in Winter, 82.8°F in Spring, 85.1°F in Summer, and 84.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
San Francisco 82.9°F 18mi
Madrid 83.8°F 37mi
San Francisco 82.8°F 43mi
San Jose 83.1°F 45mi
Santa Monica 84.2°F 51mi
Burgos 83.8°F 51mi
Medina 82.9°F 53mi
San Juan 83.0°F 55mi

* current water temperature in this city

** straight line distance from San Francisco