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 12.48°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.

54.5

°F

May 19, 02:37

Trend:

increasing

Yesterday:

54.2°F

Tomorrow:

54.9°F

Sunrise:

05:56

Sunset:

20:17

Day Length:

14 h. 21 min.

San Francisco in May

Minimum:

50.9°F

Average:

52.4°F

Maximum:

55.6°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 54.5°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 2.4°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to rise a bit.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical minimum temperature for this date. The maximum temperature recorded for this date was 60.1°F on 2020, while the historical minimum was 53.8°F on 2017.

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 minimum recorded over the past years. The forecast for the upcoming week suggests a gradual increase. The average temperature is expected to rise up to 54.9°F, with minimum temperature starting at 54.7°F, while the maximum might reach 55.0°F.

Daily water temperature in San Francisco

Date	Current Year actual* / forecast**	last year	10 years average
May 5	57.5°F	57.1°F	56.9°F
May 6	57.6°F	56.6°F	56.6°F
May 7	55.5°F	56.0°F	56.5°F
May 8	56.6°F	56.4°F	56.8°F
May 9	56.2°F	55.4°F	56.9°F
May 10	57.0°F	55.6°F	57.1°F
May 11	56.8°F	56.0°F	57.0°F
May 12	56.9°F	56.4°F	57.0°F
May 13	56.9°F	56.2°F	57.0°F
May 14	56.9°F	56.8°F	57.1°F
May 15	56.6°F	58.1°F	57.0°F
May 16	55.9°F	57.6°F	56.9°F
May 17	55.1°F	56.0°F	57.0°F
May 18	54.2°F	54.7°F	56.8°F
May 19	54.5°F	54.9°F	56.8°F
May 20	54.9°F	55.6°F	57.2°F
May 21	54.7°F	54.5°F	57.1°F
May 22	54.8°F	54.5°F	57.2°F
May 23	54.9°F	55.7°F	57.2°F
May 24	55.0°F	57.6°F	57.3°F
May 25	55.0°F	57.5°F	57.4°F
May 26	55.0°F	58.4°F	57.4°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 53.7°F in Winter, 56.2°F in Spring, 60.9°F in Summer, and 60.7°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Oakland	55.5°F	8mi
Redwood City	65.5°F	22mi
San Jose	63.2°F	42mi

* current water temperature in this city

** straight line distance from San Francisco