What is the current water temperature in San Francisco?

As of now, in San Francisco, the water temperature is 27.48°C. It's safe to say that the water is comfortably warm for various water-related activities.

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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.

81.5

°F

April 6, 10:31

Trend:

stable

Yesterday:

81.7°F

Tomorrow:

81.5°F

Sunrise:

05:40

Sunset:

18:02

Day Length:

12 h. 22 min.

San Francisco in April

Minimum:

79.8°F

Average:

81.1°F

Maximum:

83.0°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 81.5°F. It's safe to say that the water is comfortably warm for various water-related activities. Today's reading is 1.3°F lower 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 minimum temperature for this date. The maximum temperature recorded for this date was 84.2°F on 2024, while the historical minimum was 81.1°F on 2021.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the lowest values recorded on those days in the past. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 81.4°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
Mar 23	81.1°F	82.9°F	82.0°F
Mar 24	80.8°F	82.7°F	81.9°F
Mar 25	80.9°F	83.2°F	82.0°F
Mar 26	80.9°F	83.2°F	82.0°F
Mar 27	80.8°F	82.7°F	82.0°F
Mar 28	80.8°F	83.0°F	82.1°F
Mar 29	80.9°F	82.9°F	82.2°F
Mar 30	81.0°F	82.6°F	82.1°F
Mar 31	80.8°F	82.7°F	82.1°F
Apr 1	81.3°F	82.4°F	82.1°F
Apr 2	81.2°F	82.9°F	82.4°F
Apr 3	81.3°F	84.0°F	82.5°F
Apr 4	81.8°F	84.2°F	82.6°F
Apr 5	81.7°F	84.1°F	82.6°F
Apr 6	81.5°F	83.8°F	82.8°F
Apr 7	81.5°F	84.1°F	82.8°F
Apr 8	81.4°F	83.5°F	82.7°F
Apr 9	81.4°F	83.3°F	82.7°F
Apr 10	81.4°F	82.8°F	82.7°F
Apr 11	81.4°F	82.8°F	82.7°F
Apr 12	81.5°F	82.5°F	82.8°F
Apr 13	81.6°F	82.3°F	82.9°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 San Francisco, the water temperature is comfortable for swimming all year round.

The warmest water in San Francisco was recorded on September 17, 2024, reaching a 89.2°F. While the coldest temperature occurred on February 8, 2026, dipping to 77.9°F. The average readings by season are 81.0°F in Winter, 82.8°F in Spring, 85.0°F in Summer, and 85.0°F in Autumn.