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

85.0

°F

October 20, 17:39

Trend:

decreasing

Yesterday:

85.1°F

Tomorrow:

84.8°F

Sunrise:

05:41

Sunset:

17:25

Day Length:

11 h. 44 min.

San Francisco in October

Minimum:

79.3°F

Average:

81.0°F

Maximum:

82.5°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 85.0°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 0.5°F lower 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 fall a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 87.0°F on 2023, while the historical minimum was 84.7°F on 2018.

The water temperature over the last two weeks displayed soome variability. While the two week average stayed close to the historical average, there were some days when the temperature was close to the maximum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 84.5°F, the minimum temperature may reach 84.3°F, and the maximum might stay at 84.8°F.

Daily water temperature in San Francisco

Date Current Year

actual* / forecast**

last year 10 years average
Oct 6 87.4°F 86.7°F 86.2°F
Oct 7 87.1°F 87.0°F 86.1°F
Oct 8 86.8°F 87.2°F 85.8°F
Oct 9 86.4°F 87.3°F 85.7°F
Oct 10 86.4°F 87.3°F 85.7°F
Oct 11 86.6°F 87.2°F 85.7°F
Oct 12 86.5°F 87.0°F 85.9°F
Oct 13 86.2°F 86.6°F 85.9°F
Oct 14 86.3°F 86.5°F 85.9°F
Oct 15 86.0°F 86.3°F 85.8°F
Oct 16 85.8°F 86.2°F 85.7°F
Oct 17 86.0°F 85.9°F 85.7°F
Oct 18 85.7°F 85.4°F 85.6°F
Oct 19 85.1°F 85.3°F 85.5°F
Oct 20 85.0°F 85.2°F 85.5°F
Oct 21 84.8°F 84.9°F 85.3°F
Oct 22 84.7°F 84.7°F 85.2°F
Oct 23 84.6°F 84.6°F 85.1°F
Oct 24 84.3°F 84.5°F 84.8°F
Oct 25 84.4°F 84.4°F 84.8°F
Oct 26 84.4°F 84.4°F 84.9°F
Oct 27 84.3°F 84.1°F 84.8°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 September 17, 2024, reaching a 89.2°F. While the coldest temperature occurred on February 14, 2015, dipping to 78.7°F. The average readings by season are 81.0°F in Winter, 82.8°F in Spring, 84.8°F in Summer, and 85.0°F in Autumn.