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

82.9

°F

January 3, 15:43

Trend:

stable

Yesterday:

82.5°F

Tomorrow:

82.9°F

Sunrise:

05:56

Sunset:

17:30

Day Length:

11 h. 34 min.

San Francisco in January

Minimum:

80.4°F

Average:

82.0°F

Maximum:

82.8°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 82.9°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 1.0°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

The water temperature today is above average for the last two weeks, showing a small increase in temperature. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 82.5°F on 2017, while the historical minimum was 81.0°F on 2015.

Over the last two weeks, the water temperature has stayed slightly above than historical averages for those days. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 82.8°F. Both minimum and maximum temperatures expected to be close to the average, offering a week of stable water conditions.

Daily water temperature in San Francisco

Date Current Year

actual* / forecast**

 last year 10 years average
Jan 1 82.5°F 82.3°F 82.0°F
Jan 2 82.5°F 82.2°F 82.0°F
Jan 3 82.9°F 82.1°F 81.9°F
Jan 4 82.9°F 82.7°F 81.9°F
Jan 5 82.7°F 82.7°F 81.7°F
Jan 6 82.9°F 82.8°F 81.9°F
Jan 7 82.8°F 82.7°F 81.8°F
Jan 8 82.9°F 83.4°F 81.9°F
Jan 9 82.8°F 83.2°F 81.8°F
Jan 10 82.7°F 83.2°F 81.7°F
Dec 20 82.9°F 82.7°F 82.5°F
Dec 21 83.0°F 82.6°F 82.4°F
Dec 22 83.0°F 83.1°F 82.3°F
Dec 23 82.9°F 83.0°F 82.1°F
Dec 24 82.7°F 83.1°F 82.0°F
Dec 25 82.5°F 82.9°F 82.0°F
Dec 26 82.3°F 82.6°F 82.0°F
Dec 27 82.0°F 82.6°F 81.9°F
Dec 28 82.0°F 82.6°F 81.9°F
Dec 29 82.2°F 82.9°F 82.0°F
Dec 30 82.3°F 83.1°F 82.1°F
Dec 31 82.6°F 82.6°F 82.1°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

January

February

March

April

May

June

July

August

September

October

November

December

In San Francisco, the water temperature is comfortable for swimming all year round.
The warmest water in San Francisco was recorded on October 7, 2023, reaching a 86.8°F. While the coldest temperature occurred on December 23, 2018, dipping to 78.5°F. The average readings by season are 81.8°F in Winter, 82.8°F in Spring, 84.9°F in Summer, and 84.6°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
San Francisco 83.1°F 18mi
San Francisco 83.0°F 27mi
San Jose 82.9°F 29mi
San Juan 82.9°F 38mi
Santa Monica 84.0°F 45mi
Madrid 83.9°F 51mi

* current water temperature in this city

** straight line distance from San Francisco