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 15.1°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.

59.2

°F

May 23, 11:01

Trend:

stable

Yesterday:

60.0°F

Tomorrow:

59.3°F

Sunrise:

05:54

Sunset:

20:19

Day Length:

14 h. 25 min.

San Francisco in May

Minimum:

51.0°F

Average:

52.7°F

Maximum:

55.6°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 59.2°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 1.2°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 stay about the same.

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 60.1°F on 2020, while the historical minimum was 55.7°F on 2023.

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 suggests a gradual increase. The average temperature is expected to rise up to 59.7°F, with minimum temperature starting at 59.3°F, while the maximum might reach 60.3°F.

Daily water temperature in San Francisco

Date	Current Year actual* / forecast**	last year	10 years average
May 9	60.1°F	57.8°F	57.4°F
May 10	60.0°F	57.9°F	57.6°F
May 11	59.4°F	57.9°F	57.5°F
May 12	60.0°F	58.1°F	57.7°F
May 13	58.2°F	59.2°F	57.8°F
May 14	58.3°F	58.8°F	57.8°F
May 15	58.4°F	57.2°F	57.4°F
May 16	57.9°F	57.8°F	57.3°F
May 17	58.0°F	59.3°F	57.6°F
May 18	58.3°F	59.4°F	57.4°F
May 19	57.3°F	59.4°F	57.2°F
May 20	58.6°F	59.1°F	57.8°F
May 21	60.0°F	59.8°F	57.9°F
May 22	60.0°F	58.9°F	58.0°F
May 23	59.2°F	59.5°F	58.0°F
May 24	59.3°F	59.3°F	58.1°F
May 25	59.3°F	59.5°F	58.2°F
May 26	59.4°F	58.9°F	58.2°F
May 27	59.5°F	58.9°F	58.3°F
May 28	59.9°F	57.8°F	58.7°F
May 29	60.1°F	59.1°F	58.9°F
May 30	60.3°F	57.8°F	59.1°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, 61.2°F in Summer, and 60.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Oakland	62.2°F	8mi
Redwood City	65.4°F	22mi
San Jose	65.0°F	42mi

* current water temperature in this city

** straight line distance from San Francisco