What is the current water temperature in San Francisco?

Q: What is the current water temperature in San Francisco?

As of now, in San Francisco, the water temperature is 14.81°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.

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.

58.7

°F

April 17, 21:49

Trend:

increasing

Yesterday:

57.5°F

Tomorrow:

58.9°F

Sunrise:

06:32

Sunset:

19:47

Day Length:

13 h. 15 min.

San Francisco in April

Minimum:

51.0°F

Average:

52.6°F

Maximum:

55.4°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 58.7°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 2.4°F higher than the average recorded on this particular day in recent years. Since yesterday, there was a noticeable 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 notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 58.1°F on 2016, while the historical minimum was 54.5°F on 2023.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 59.3°F, with minimum temperature starting at 58.8°F, while the maximum might reach 59.8°F.

Daily water temperature in San Francisco

Date	Current Year actual* / forecast**	last year	10 years average
Apr 3	55.6°F	56.9°F	56.2°F
Apr 4	55.2°F	57.2°F	56.1°F
Apr 5	55.4°F	57.0°F	55.9°F
Apr 6	55.6°F	57.3°F	55.9°F
Apr 7	55.9°F	55.8°F	55.6°F
Apr 8	56.6°F	56.2°F	56.0°F
Apr 9	55.7°F	56.2°F	56.2°F
Apr 10	56.0°F	55.7°F	56.4°F
Apr 11	56.4°F	56.5°F	56.5°F
Apr 12	57.5°F	56.8°F	56.7°F
Apr 13	57.5°F	56.4°F	56.6°F
Apr 14	56.3°F	55.9°F	56.6°F
Apr 15	56.8°F	56.4°F	56.4°F
Apr 16	57.5°F	55.1°F	56.5°F
Apr 17	58.7°F	55.0°F	56.3°F
Apr 18	58.9°F	56.2°F	56.5°F
Apr 19	58.8°F	56.9°F	56.4°F
Apr 20	58.9°F	57.4°F	56.5°F
Apr 21	59.4°F	58.4°F	57.0°F
Apr 22	59.5°F	56.7°F	57.1°F
Apr 23	59.7°F	57.1°F	57.3°F
Apr 24	59.8°F	56.3°F	57.4°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 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	60.6°F	8mi
Redwood City	61.4°F	22mi
San Jose	60.5°F	42mi

* current water temperature in this city

** straight line distance from San Francisco