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 12.42°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.

54.4

°F

December 29, 02:33

Trend:

stable

Yesterday:

55.5°F

Tomorrow:

54.5°F

Sunrise:

07:25

Sunset:

16:59

Day Length:

9 h. 34 min.

San Francisco in January

Minimum:

51.1°F

Average:

53.0°F

Maximum:

55.6°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 54.4°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 1.7°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 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 55.2°F on 2018, while the historical minimum was 51.0°F on 2022.

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 54.4°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 1	54.6°F	53.4°F	53.0°F
Jan 2	54.5°F	53.0°F	52.8°F
Jan 3	54.2°F	51.9°F	52.6°F
Jan 4	54.3°F	53.4°F	52.6°F
Jan 5	54.3°F	53.3°F	52.6°F
Dec 15	53.4°F	53.3°F	54.0°F
Dec 16	53.3°F	52.8°F	53.9°F
Dec 17	53.3°F	52.0°F	53.7°F
Dec 18	54.6°F	51.9°F	53.7°F
Dec 19	53.3°F	53.4°F	53.6°F
Dec 20	53.4°F	53.2°F	53.3°F
Dec 21	53.5°F	53.3°F	53.3°F
Dec 22	53.8°F	53.2°F	53.3°F
Dec 23	54.2°F	53.3°F	53.5°F
Dec 24	54.4°F	53.3°F	53.4°F
Dec 25	54.9°F	53.7°F	53.4°F
Dec 26	55.1°F	53.0°F	53.2°F
Dec 27	55.8°F	53.2°F	53.2°F
Dec 28	55.5°F	53.3°F	53.2°F
Dec 29	54.4°F	52.9°F	52.7°F
Dec 30	54.5°F	54.4°F	52.8°F
Dec 31	54.3°F	53.7°F	52.7°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 53.6°F in Winter, 56.3°F in Spring, 61.1°F in Summer, and 60.8°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Oakland	53.7°F	8mi
Redwood City	54.4°F	22mi
San Jose	53.7°F	42mi

* current water temperature in this city

** straight line distance from San Francisco