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 12.54°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.

54.6

°F

December 18, 00:43

Trend:

stable

Yesterday:

53.3°F

Tomorrow:

54.5°F

Sunrise:

07:20

Sunset:

16:53

Day Length:

9 h. 33 min.

San Francisco in December

Minimum:

51.4°F

Average:

52.7°F

Maximum:

54.4°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 54.6°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 0.9°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 stay about the same.

Recent sea temperature and forecast

Today's water temperature slightly varies from the average of the past two weeks. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 55.8°F on 2018, while the historical minimum was 51.5°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 histoorical minimum and others when it was close to the historical maximum. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 54.2°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
Dec 4	56.3°F	53.9°F	55.2°F
Dec 5	55.7°F	53.8°F	55.1°F
Dec 6	55.6°F	53.7°F	54.9°F
Dec 7	55.5°F	53.8°F	54.7°F
Dec 8	56.2°F	54.5°F	54.8°F
Dec 9	54.7°F	54.2°F	54.6°F
Dec 10	54.4°F	54.7°F	54.5°F
Dec 11	54.6°F	54.2°F	54.5°F
Dec 12	54.3°F	54.1°F	54.4°F
Dec 13	54.7°F	54.1°F	54.4°F
Dec 14	53.6°F	53.9°F	54.2°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	54.5°F	53.4°F	53.6°F
Dec 20	54.2°F	53.2°F	53.3°F
Dec 21	54.2°F	53.3°F	53.3°F
Dec 22	54.2°F	53.2°F	53.3°F
Dec 23	54.4°F	53.3°F	53.4°F
Dec 24	54.2°F	53.3°F	53.3°F
Dec 25	54.1°F	53.7°F	53.2°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 60.8°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Oakland	52.8°F	8mi
Redwood City	53.6°F	22mi
San Jose	52.7°F	42mi

* current water temperature in this city

** straight line distance from San Francisco