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

84.7

°F

September 11, 15:08

Trend:

stable

Yesterday:

84.5°F

Tomorrow:

84.4°F

Sunrise:

05:34

Sunset:

17:50

Day Length:

12 h. 16 min.

San Francisco in September

Minimum:

80.9°F

Average:

81.6°F

Maximum:

82.9°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 84.7°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 1.0°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 fall a bit.

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 minimum temperature for this date. The maximum temperature recorded for this date was 86.9°F on 2024, while the historical minimum was 84.8°F on 2019.

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 84.1°F, the minimum temperature may reach 83.9°F, and the maximum might stay at 84.4°F.

Daily water temperature in San Francisco

Date Current Year

actual* / forecast**

last year 10 years average
Aug 28 83.9°F 85.0°F 84.9°F
Aug 29 83.9°F 85.0°F 85.0°F
Aug 30 83.8°F 85.0°F 85.0°F
Aug 31 83.8°F 84.9°F 85.0°F
Sep 1 84.2°F 85.0°F 85.1°F
Sep 2 83.7°F 85.0°F 85.1°F
Sep 3 84.3°F 85.4°F 85.2°F
Sep 4 84.1°F 85.8°F 85.2°F
Sep 5 84.1°F 85.8°F 85.4°F
Sep 6 84.1°F 85.8°F 85.4°F
Sep 7 84.3°F 85.9°F 85.5°F
Sep 8 84.2°F 84.9°F 85.4°F
Sep 9 84.3°F 84.9°F 85.4°F
Sep 10 84.5°F 84.8°F 85.5°F
Sep 11 84.7°F 85.0°F 85.7°F
Sep 12 84.4°F 84.9°F 85.5°F
Sep 13 84.2°F 84.7°F 85.2°F
Sep 14 83.9°F 84.5°F 85.0°F
Sep 15 84.0°F 84.5°F 85.0°F
Sep 16 84.0°F 84.5°F 85.0°F
Sep 17 84.0°F 84.5°F 85.1°F
Sep 18 83.9°F 84.4°F 85.0°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 June 15, 2024, reaching a 88.6°F. While the coldest temperature occurred on January 14, 2023, dipping to 79.0°F. The average readings by season are 81.9°F in Winter, 84.1°F in Spring, 85.9°F in Summer, and 84.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Santo Domingo 84.6°F 6mi
Padang 84.6°F 7mi
San Francisco 84.8°F 19mi
San Jose 84.3°F 26mi
San Sebastian 84.7°F 30mi
San Jose 84.7°F 31mi

* current water temperature in this city

** straight line distance from San Francisco