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United States > San Francisco

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

57.7

°F

May 9, 00:29

Trend:

stable

Yesterday:

57.7°F

Tomorrow:

57.9°F

Sunrise:

06:05

Sunset:

20:07

Day Length:

14 h. 2 min.

San Francisco in May

Minimum:

51.0°F

Average:

52.6°F

Maximum:

55.6°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 57.7°F. Swimming in water of this temperature is considered as extremely cold, and there's a substantial risk of hypothermia if exposed for more than a brief duration. Today's reading is 0.9°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 rise 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 59.2°F on 2020, while the historical minimum was 54.3°F on 2015.

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 histoorical minimum and others when it was close to the historical maximum. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 57.9°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
Apr 25 55.6°F 56.2°F 57.2°F
Apr 26 56.3°F 57.8°F 57.3°F
Apr 27 56.9°F 58.7°F 57.2°F
Apr 28 56.3°F 58.1°F 57.2°F
Apr 29 54.4°F 58.7°F 57.2°F
Apr 30 55.7°F 59.4°F 57.2°F
May 1 56.0°F 59.4°F 57.1°F
May 2 56.4°F 58.6°F 57.1°F
May 3 58.3°F 57.8°F 57.3°F
May 4 58.9°F 59.0°F 57.5°F
May 5 57.9°F 57.5°F 57.2°F
May 6 57.4°F 57.6°F 56.8°F
May 7 57.6°F 55.5°F 56.6°F
May 8 57.7°F 56.6°F 56.8°F
May 9 57.7°F 56.2°F 56.8°F
May 10 57.9°F 57.0°F 57.0°F
May 11 57.9°F 56.9°F 57.0°F
May 12 58.0°F 57.0°F 57.0°F
May 13 58.0°F 57.0°F 57.1°F
May 14 58.0°F 57.1°F 57.1°F
May 15 57.9°F 56.6°F 57.0°F
May 16 57.8°F 55.9°F 56.9°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 an average year, San Francisco offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in San Francisco was recorded on August 28, 2023, reaching a 67.4°F. While the coldest temperature occurred on March 4, 2023, dipping to 49.3°F. The average readings by season are 53.5°F in Winter, 56.3°F in Spring, 61.1°F in Summer, and 60.6°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Oakland 60.4°F 8mi
Redwood City 64.1°F 22mi
San Jose 62.0°F 42mi

* current water temperature in this city

** straight line distance from San Francisco