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 19.13°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool.

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.

66.4

°F

September 10, 15:27

Trend:

stable

Yesterday:

64.2°F

Tomorrow:

66.1°F

Sunrise:

06:47

Sunset:

19:25

Day Length:

12 h. 38 min.

San Francisco in September

Minimum:

51.4°F

Average:

52.9°F

Maximum:

55.5°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 66.4°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 2.5°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 fall 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 65.9°F on 2023, while the historical minimum was 58.7°F on 2016.

latest data

last year

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 maximum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 65.8°F, the minimum temperature may reach 65.3°F, and the maximum might stay at 66.3°F.

Daily water temperature in San Francisco

Date	Current Year actual* / forecast**	last year	10 years average
Aug 27	65.6°F	64.0°F	63.4°F
Aug 28	65.1°F	63.8°F	63.6°F
Aug 29	64.4°F	63.9°F	63.5°F
Aug 30	63.9°F	64.0°F	63.4°F
Aug 31	62.9°F	65.0°F	63.2°F
Sep 1	62.6°F	66.0°F	63.7°F
Sep 2	62.3°F	66.6°F	63.4°F
Sep 3	64.5°F	65.9°F	63.7°F
Sep 4	64.5°F	65.4°F	63.5°F
Sep 5	64.2°F	63.4°F	63.5°F
Sep 6	64.7°F	63.4°F	63.5°F
Sep 7	64.1°F	63.4°F	63.7°F
Sep 8	64.1°F	63.3°F	63.5°F
Sep 9	64.2°F	64.4°F	64.0°F
Sep 10	66.4°F	65.1°F	64.0°F
Sep 11	66.1°F	63.6°F	63.7°F
Sep 12	65.9°F	62.3°F	63.4°F
Sep 13	66.3°F	64.7°F	63.9°F
Sep 14	65.7°F	65.1°F	63.2°F
Sep 15	65.7°F	65.1°F	63.2°F
Sep 16	65.3°F	65.2°F	62.9°F
Sep 17	65.4°F	65.7°F	63.0°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 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, 56.6°F in Spring, 61.4°F in Summer, and 60.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Oakland	67.8°F	8mi
Redwood City	70.0°F	22mi
San Jose	69.5°F	42mi

* current water temperature in this city

** straight line distance from San Francisco