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 30.31°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.

86.6

°F

May 25, 14:14

Trend:

increasing

Yesterday:

85.3°F

Tomorrow:

86.8°F

Sunrise:

07:21

Sunset:

20:36

Day Length:

13 h. 15 min.

San Francisco in June

Minimum:

71.2°F

Average:

78.0°F

Maximum:

80.0°F

Sea water temperature in San Francisco today

As of now, in San Francisco, the water temperature is 86.6°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 4.9°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 rise 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 84.3°F on 2023, while the historical minimum was 78.6°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 histoorical minimum and others when it was close to the historical maximum. Over the next week, the forecast shows a steady trend, with temperatures staying close to the average of 86.8°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
May 11	78.3°F	80.9°F	79.8°F
May 12	79.3°F	81.4°F	80.3°F
May 13	79.4°F	82.4°F	80.8°F
May 14	80.1°F	83.2°F	81.0°F
May 15	81.7°F	82.4°F	80.9°F
May 16	82.3°F	81.6°F	80.9°F
May 17	82.8°F	81.4°F	81.1°F
May 18	83.2°F	82.5°F	81.4°F
May 19	83.8°F	83.2°F	81.4°F
May 20	84.6°F	84.0°F	81.6°F
May 21	85.8°F	83.7°F	81.8°F
May 22	84.7°F	84.5°F	82.0°F
May 23	85.0°F	83.3°F	82.1°F
May 24	85.3°F	83.6°F	82.1°F
May 25	86.6°F	82.8°F	81.7°F
May 26	86.8°F	84.4°F	81.9°F
May 27	86.7°F	84.5°F	81.8°F
May 28	86.7°F	83.4°F	81.9°F
May 29	86.8°F	83.2°F	81.9°F
May 30	86.9°F	83.2°F	82.1°F
May 31	87.0°F	83.2°F	82.1°F
Jun 1	86.9°F	83.3°F	82.0°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.