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

83.7

°F

December 22, 13:46

Trend:

stable

Yesterday:

83.7°F

Tomorrow:

83.6°F

Sunrise:

06:07

Sunset:

17:35

Day Length:

11 h. 28 min.

San Francisco in December

Minimum:

79.7°F

Average:

82.0°F

Maximum:

83.6°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 83.7°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 0.4°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 is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 84.5°F on 2020, while the historical minimum was 82.2°F on 2014.

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 83.7°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
Dec 8 85.1°F 84.3°F 84.5°F
Dec 9 84.5°F 84.9°F 84.2°F
Dec 10 84.1°F 84.8°F 83.9°F
Dec 11 84.2°F 84.7°F 83.9°F
Dec 12 84.4°F 84.5°F 84.2°F
Dec 13 84.6°F 84.6°F 84.1°F
Dec 14 85.1°F 84.1°F 84.2°F
Dec 15 84.8°F 84.5°F 84.0°F
Dec 16 84.3°F 84.5°F 83.7°F
Dec 17 84.1°F 84.6°F 83.6°F
Dec 18 83.9°F 84.2°F 83.3°F
Dec 19 84.3°F 84.1°F 83.4°F
Dec 20 84.1°F 84.0°F 83.2°F
Dec 21 83.7°F 84.5°F 83.3°F
Dec 22 83.7°F 84.2°F 83.3°F
Dec 23 83.6°F 84.0°F 83.2°F
Dec 24 83.6°F 83.8°F 83.2°F
Dec 25 83.8°F 83.7°F 83.4°F
Dec 26 83.8°F 83.6°F 83.4°F
Dec 27 83.7°F 83.5°F 83.3°F
Dec 28 83.7°F 83.8°F 83.3°F
Dec 29 83.6°F 83.4°F 83.2°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 May 23, 2024, reaching a 88.5°F. While the coldest temperature occurred on February 2, 2014, dipping to 78.3°F. The average readings by season are 82.3°F in Winter, 84.5°F in Spring, 85.5°F in Summer, and 84.9°F in Autumn.