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 13.45°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.

56.2

°F

February 12, 04:39

Trend:

stable

Yesterday:

56.1°F

Tomorrow:

56.1°F

Sunrise:

07:03

Sunset:

17:45

Day Length:

10 h. 42 min.

San Francisco in February

Minimum:

51.0°F

Average:

52.7°F

Maximum:

55.5°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 56.2°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 2.7°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 stay about the same.

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 55.4°F on 2018, while the historical minimum was 51.7°F on 2025.

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 56.2°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
Jan 29	54.5°F	52.0°F	53.1°F
Jan 30	55.2°F	52.0°F	53.1°F
Jan 31	54.9°F	53.1°F	53.2°F
Feb 1	54.8°F	53.2°F	53.2°F
Feb 2	54.3°F	53.2°F	53.3°F
Feb 3	54.6°F	53.2°F	53.5°F
Feb 4	55.9°F	53.3°F	53.6°F
Feb 5	55.5°F	53.3°F	53.7°F
Feb 6	55.8°F	52.5°F	53.5°F
Feb 7	56.1°F	52.3°F	53.4°F
Feb 8	56.9°F	52.3°F	53.6°F
Feb 9	56.3°F	51.9°F	53.6°F
Feb 10	56.3°F	51.9°F	53.7°F
Feb 11	56.1°F	51.5°F	53.7°F
Feb 12	56.2°F	51.7°F	53.5°F
Feb 13	56.1°F	51.9°F	53.4°F
Feb 14	56.4°F	52.2°F	53.7°F
Feb 15	56.3°F	52.6°F	53.6°F
Feb 16	56.3°F	51.7°F	53.6°F
Feb 17	56.3°F	51.8°F	53.6°F
Feb 18	56.2°F	51.8°F	53.6°F
Feb 19	56.2°F	52.0°F	53.6°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, 56.4°F in Spring, 61.2°F in Summer, and 60.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Oakland	56.2°F	8mi
Redwood City	56.8°F	22mi
San Jose	56.7°F	42mi

* current water temperature in this city

** straight line distance from San Francisco