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 18.37°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

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.

65.1

°F

September 15, 08:02

Trend:

decreasing

Yesterday:

65.1°F

Tomorrow:

64.7°F

Sunrise:

06:51

Sunset:

19:18

Day Length:

12 h. 27 min.

San Francisco in September

Minimum:

51.4°F

Average:

52.8°F

Maximum:

55.5°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 65.1°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 2.4°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 fall 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 65.0°F on 2021, while the historical minimum was 59.3°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. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 64.9°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
Sep 1	66.0°F	63.0°F	63.7°F
Sep 2	66.6°F	61.9°F	63.4°F
Sep 3	65.9°F	62.5°F	63.5°F
Sep 4	65.4°F	62.5°F	63.2°F
Sep 5	63.4°F	63.9°F	63.2°F
Sep 6	63.4°F	63.8°F	63.2°F
Sep 7	63.4°F	64.2°F	63.4°F
Sep 8	63.3°F	63.2°F	63.2°F
Sep 9	64.4°F	64.4°F	63.7°F
Sep 10	65.1°F	65.6°F	63.8°F
Sep 11	63.6°F	65.1°F	63.5°F
Sep 12	62.3°F	64.9°F	63.2°F
Sep 13	64.7°F	65.7°F	63.6°F
Sep 14	65.1°F	64.6°F	62.9°F
Sep 15	65.1°F	64.6°F	62.7°F
Sep 16	64.7°F	62.8°F	62.3°F
Sep 17	64.7°F	61.6°F	62.3°F
Sep 18	65.0°F	61.2°F	62.6°F
Sep 19	64.9°F	61.4°F	62.5°F
Sep 20	65.0°F	61.0°F	62.7°F
Sep 21	65.2°F	62.6°F	62.8°F
Sep 22	65.0°F	61.8°F	62.7°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, 56.3°F in Spring, 61.1°F in Summer, and 60.6°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Oakland	67.7°F	8mi
Redwood City	70.0°F	22mi
San Jose	68.1°F	42mi

* current water temperature in this city

** straight line distance from San Francisco