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

85.8

°F

May 11, 20:37

Trend:

increasing

Yesterday:

85.5°F

Tomorrow:

86.1°F

Sunrise:

05:30

Sunset:

18:07

Day Length:

12 h. 37 min.

San Francisco in May

Minimum:

81.8°F

Average:

82.9°F

Maximum:

83.8°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 85.8°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 0.6°F lower 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 rise a bit.

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 is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 87.1°F on 2016, while the historical minimum was 85.3°F on 2021.

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 minimum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 86.2°F, with minimum temperature starting at 86.1°F, while the maximum might reach 86.5°F.

Daily water temperature in San Francisco

Date Current Year

actual* / forecast**

last year 10 years average
Apr 27 86.3°F 86.1°F 86.0°F
Apr 28 86.1°F 85.9°F 86.0°F
Apr 29 85.8°F 86.0°F 86.2°F
Apr 30 86.2°F 86.4°F 86.2°F
May 1 86.3°F 86.8°F 86.2°F
May 2 85.9°F 86.5°F 86.1°F
May 3 85.9°F 86.5°F 86.2°F
May 4 85.7°F 86.7°F 86.4°F
May 5 85.8°F 86.7°F 86.3°F
May 6 85.6°F 86.5°F 86.3°F
May 7 86.3°F 85.9°F 86.3°F
May 8 86.3°F 85.9°F 86.4°F
May 9 86.2°F 86.6°F 86.4°F
May 10 85.5°F 86.5°F 86.3°F
May 11 85.8°F 86.6°F 86.4°F
May 12 86.1°F 86.9°F 86.6°F
May 13 86.2°F 87.0°F 86.8°F
May 14 86.2°F 87.0°F 86.8°F
May 15 86.3°F 87.0°F 86.9°F
May 16 86.1°F 86.9°F 86.7°F
May 17 86.4°F 87.1°F 87.0°F
May 18 86.5°F 87.7°F 87.1°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

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 16, 2019, dipping to 79.3°F. The average readings by season are 82.6°F in Winter, 84.7°F in Spring, 85.6°F in Summer, and 85.0°F in Autumn.