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 15.03°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.

59.1

°F

April 11, 07:39

Trend:

stable

Yesterday:

59.7°F

Tomorrow:

59.2°F

Sunrise:

06:40

Sunset:

19:42

Day Length:

13 h. 2 min.

San Francisco in April

Minimum:

51.0°F

Average:

52.7°F

Maximum:

55.4°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 59.1°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 2.5°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 is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 59.2°F on 2019, while the historical minimum was 54.0°F on 2023.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 59.1°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
Mar 28	58.6°F	55.9°F	56.0°F
Mar 29	59.5°F	55.5°F	55.9°F
Mar 30	58.3°F	55.7°F	56.0°F
Mar 31	58.1°F	56.1°F	56.1°F
Apr 1	57.4°F	56.5°F	56.0°F
Apr 2	56.7°F	55.6°F	56.0°F
Apr 3	59.0°F	55.6°F	56.6°F
Apr 4	57.4°F	55.2°F	56.4°F
Apr 5	57.8°F	55.4°F	56.3°F
Apr 6	58.9°F	55.6°F	56.4°F
Apr 7	59.7°F	55.9°F	56.2°F
Apr 8	58.9°F	56.6°F	56.4°F
Apr 9	59.3°F	55.7°F	56.6°F
Apr 10	59.7°F	56.0°F	56.7°F
Apr 11	59.1°F	56.4°F	56.5°F
Apr 12	59.2°F	57.5°F	56.7°F
Apr 13	59.1°F	57.5°F	56.6°F
Apr 14	59.0°F	56.3°F	56.5°F
Apr 15	58.9°F	56.8°F	56.4°F
Apr 16	59.1°F	57.5°F	56.6°F
Apr 17	59.1°F	58.7°F	56.6°F
Apr 18	59.2°F	57.8°F	56.7°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, 56.5°F in Spring, 61.2°F in Summer, and 60.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Oakland	61.2°F	8mi
Redwood City	64.5°F	22mi
San Jose	63.8°F	42mi

* current water temperature in this city

** straight line distance from San Francisco