All data are in degrees Fahrenheit

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Water temperature in San Diego

Detailed information about the current water temperature in San Diego. 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.
Sea temperature in San Diego now

69.9

°F

August 23, 01:29

Trend:

increasing

Yesterday:

69.5°F

Tomorrow:

70.0°F

Sunrise:

06:17

Sunset:

19:25

Day Length:

13 h. 8 min.

San Diego in August

Minimum:

56.6°F

Average:

59.5°F

Maximum:

62.5°F

Sea water temperature in San Diego today

As of now, in San Diego, the water temperature is 69.9°F. Swimming in water of this temperature is seen as relatively warm and enjoyable for some individuals, although many might find it slightly too cool. Today's reading is 0.6°F lower than the average recorded on this particular day in recent years. Since yesterday, there was a slight increase in temperature. This indicates a warming trend over the past day. According to the forecast, we expect the temperature to stay about the same.

Recent sea temperature and forecast

Today's water temperature is slightly lower than the average registered over the last two weeks, indicating a slight cooling trend. It also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 75.0°F on 2018, while the historical minimum was 64.9°F on 2023.

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 shows a gradual cooling trend. The average temperature is expected to be 69.5°F, the minimum temperature may reach 68.7°F, and the maximum might stay at 70.2°F.

Daily water temperature in San Diego

Date Current Year

actual* / forecast**

last year 10 years average
Aug 9 71.2°F 68.7°F 70.2°F
Aug 10 72.2°F 69.2°F 70.7°F
Aug 11 72.6°F 69.6°F 71.0°F
Aug 12 73.4°F 66.7°F 70.7°F
Aug 13 72.1°F 67.6°F 70.6°F
Aug 14 72.0°F 68.1°F 70.5°F
Aug 15 71.2°F 68.1°F 70.4°F
Aug 16 71.0°F 67.6°F 70.2°F
Aug 17 70.3°F 67.6°F 70.1°F
Aug 18 69.4°F 68.4°F 70.3°F
Aug 19 67.8°F 69.5°F 70.2°F
Aug 20 67.9°F 70.3°F 70.3°F
Aug 21 69.1°F 70.6°F 70.3°F
Aug 22 69.5°F 71.1°F 70.2°F
Aug 23 69.9°F 71.9°F 70.6°F
Aug 24 70.0°F 72.1°F 70.6°F
Aug 25 70.2°F 72.4°F 70.9°F
Aug 26 69.9°F 71.7°F 70.5°F
Aug 27 69.5°F 71.7°F 70.1°F
Aug 28 69.2°F 72.0°F 69.9°F
Aug 29 68.7°F 71.3°F 69.4°F
Aug 30 68.7°F 71.4°F 69.4°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 Diego by month

In an average year, San Diego offers no days when the water temperature is warm enough to swim comfortably.
The warmest water in San Diego was recorded on August 7, 2018, reaching a 75.8°F. While the coldest temperature occurred on January 15, 2025, dipping to 55.5°F. The average readings by season are 59.6°F in Winter, 61.7°F in Spring, 68.3°F in Summer, and 65.9°F in Autumn.

Popular neighboring cities and resorts

City Water temperature* Distance**
Tijuana 70.2°F 17mi
Oceanside 75.2°F 35mi
Laguna Beach 74.2°F 67mi

* current water temperature in this city

** straight line distance from San Diego