What is the current water temperature in San Diego?

Q: What is the current water temperature in San Diego?

As of now, in San Diego, the water temperature is 21.51°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.

United States > San Diego

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.

70.7

°F

July 20, 10:46

Trend:

stable

Yesterday:

70.5°F

Tomorrow:

70.6°F

Sunrise:

05:55

Sunset:

19:55

Day Length:

14 h. 0 min.

San Diego in July

Minimum:

56.0°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 70.7°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 0.7°F higher 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 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 also aligns closely with the historical average temperature for this date, indicating a typical climate pattern. The maximum temperature recorded for this date was 73.1°F on 2017, while the historical minimum was 66.9°F on 2023.

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 maximum recorded over the past years. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 70.3°F, the minimum temperature may reach 70.1°F, and the maximum might stay at 70.6°F.

Daily water temperature in San Diego

Date	Current Year actual* / forecast**	last year	10 years average
Jul 6	67.5°F	65.6°F	67.8°F
Jul 7	66.9°F	66.0°F	67.8°F
Jul 8	66.7°F	65.5°F	67.6°F
Jul 9	66.7°F	65.1°F	68.0°F
Jul 10	67.2°F	64.0°F	68.2°F
Jul 11	67.7°F	63.5°F	68.5°F
Jul 12	69.2°F	64.0°F	68.8°F
Jul 13	70.1°F	65.6°F	69.0°F
Jul 14	70.7°F	66.3°F	69.0°F
Jul 15	69.9°F	66.6°F	69.0°F
Jul 16	70.0°F	66.5°F	69.0°F
Jul 17	70.0°F	67.0°F	69.2°F
Jul 18	70.0°F	67.9°F	69.6°F
Jul 19	70.5°F	68.1°F	69.9°F
Jul 20	70.7°F	68.5°F	70.0°F
Jul 21	70.6°F	68.5°F	69.8°F
Jul 22	70.3°F	68.4°F	69.6°F
Jul 23	70.1°F	68.9°F	69.4°F
Jul 24	70.3°F	69.2°F	69.5°F
Jul 25	70.5°F	68.9°F	69.7°F
Jul 26	70.4°F	67.2°F	69.7°F
Jul 27	70.3°F	65.7°F	69.5°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	70.4°F	17mi
Oceanside	74.3°F	35mi
Laguna Beach	73.5°F	67mi

* current water temperature in this city

** straight line distance from San Diego