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

May 3, 09:25

Trend:

stable

Yesterday:

80.0°F

Tomorrow:

81.3°F

Sunrise:

07:30

Sunset:

20:27

Day Length:

12 h. 57 min.

San Francisco in May

Minimum:

71.5°F

Average:

78.1°F

Maximum:

80.2°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 2.0°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 fall a bit.

Recent sea temperature and forecast

Today's water temperature is notably higher than the average recorded over the past two weeks, indicating a significant warming trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 80.7°F on 2023, while the historical minimum was 77.6°F on 2019.

latest data

last year

Observations from the last two weeks indicate that the water temperature was in proximity to the highest 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 81.8°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
Apr 19	82.5°F	76.4°F	78.0°F
Apr 20	81.4°F	76.6°F	77.9°F
Apr 21	80.1°F	75.4°F	78.1°F
Apr 22	80.3°F	75.5°F	78.0°F
Apr 23	80.1°F	73.9°F	77.7°F
Apr 24	80.2°F	75.8°F	77.8°F
Apr 25	79.2°F	76.0°F	77.8°F
Apr 26	79.3°F	76.1°F	77.9°F
Apr 27	80.6°F	76.2°F	78.4°F
Apr 28	79.8°F	77.2°F	78.6°F
Apr 29	80.0°F	78.1°F	78.8°F
Apr 30	80.3°F	79.5°F	79.1°F
May 1	79.8°F	78.3°F	79.1°F
May 2	80.0°F	78.4°F	79.3°F
May 3	81.5°F	80.5°F	79.5°F
May 4	81.3°F	79.8°F	79.3°F
May 5	81.6°F	80.1°F	79.6°F
May 6	81.8°F	80.4°F	79.8°F
May 7	81.8°F	80.3°F	79.8°F
May 8	82.0°F	80.5°F	80.0°F
May 9	81.9°F	80.9°F	79.9°F
May 10	82.0°F	81.0°F	80.0°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 July 31, 2023, reaching a 89.6°F. While the coldest temperature occurred on January 25, 2025, dipping to 70.5°F. The average readings by season are 77.8°F in Winter, 78.2°F in Spring, 85.6°F in Summer, and 85.9°F in Autumn.