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 31.75°C. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort.

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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.

89.2

°F

July 25, 05:24

Trend:

decreasing

Yesterday:

89.2°F

Tomorrow:

89.0°F

Sunrise:

07:33

Sunset:

20:43

Day Length:

13 h. 10 min.

San Francisco in August

Minimum:

72.1°F

Average:

77.9°F

Maximum:

80.2°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 89.2°F. Swimming in water of this temperature is considered highly warm and would be enjoyable for everyone. At this temperature, you can comfortably engage in water-based activities for extended periods without experiencing discomfort. Today's reading is 2.2°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 fall a bit.

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 88.9°F on 2025, while the historical minimum was 85.9°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 89.3°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
Jul 11	88.4°F	86.6°F	86.4°F
Jul 12	87.8°F	86.4°F	86.4°F
Jul 13	88.7°F	86.5°F	86.5°F
Jul 14	88.7°F	86.8°F	86.7°F
Jul 15	88.7°F	86.7°F	86.8°F
Jul 16	88.8°F	86.5°F	86.7°F
Jul 17	88.5°F	87.5°F	86.8°F
Jul 18	88.8°F	88.4°F	87.1°F
Jul 19	88.3°F	87.9°F	87.1°F
Jul 20	88.0°F	87.9°F	87.0°F
Jul 21	88.7°F	88.2°F	87.2°F
Jul 22	88.6°F	88.4°F	87.4°F
Jul 23	89.0°F	89.2°F	87.6°F
Jul 24	89.2°F	88.6°F	87.3°F
Jul 25	89.2°F	88.9°F	87.0°F
Jul 26	89.0°F	87.8°F	86.8°F
Jul 27	89.0°F	88.0°F	86.8°F
Jul 28	89.2°F	88.0°F	87.0°F
Jul 29	89.2°F	87.8°F	87.1°F
Jul 30	89.4°F	87.6°F	87.3°F
Jul 31	89.6°F	88.0°F	87.4°F
Aug 1	89.5°F	87.8°F	87.4°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 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, 78.3°F in Spring, 85.7°F in Summer, and 85.9°F in Autumn.