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 18.01°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it.

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.

64.4

°F

April 18, 01:26

Trend:

stable

Yesterday:

65.4°F

Tomorrow:

64.5°F

Sunrise:

06:16

Sunset:

19:21

Day Length:

13 h. 5 min.

San Diego in April

Minimum:

56.2°F

Average:

59.6°F

Maximum:

62.3°F

Sea water temperature in San Diego today

As of now, in San Diego, the water temperature is 64.4°F. Swimming in water of this temperature is generally concidered to be cool, and most people won't really enjoy it. Today's reading is 3.3°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 stay about the same.

Recent sea temperature and forecast

Today's water temperature is considerably lower than the average registered over the last two weeks, indicating a slight cooling trend. It is also close to the historical maximum temperature for this date. The maximum temperature recorded for this date was 63.7°F on 2016, while the historical minimum was 57.9°F on 2023.

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 64.3°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 Diego

Date	Current Year actual* / forecast**	last year	10 years average
Apr 4	65.3°F	56.6°F	61.0°F
Apr 5	65.5°F	56.2°F	60.9°F
Apr 6	66.4°F	56.2°F	61.1°F
Apr 7	66.3°F	56.3°F	61.2°F
Apr 8	66.2°F	56.8°F	61.3°F
Apr 9	66.3°F	57.3°F	61.4°F
Apr 10	66.4°F	57.1°F	61.4°F
Apr 11	66.7°F	58.1°F	61.7°F
Apr 12	66.7°F	57.9°F	61.8°F
Apr 13	66.1°F	58.4°F	61.6°F
Apr 14	65.6°F	59.3°F	61.7°F
Apr 15	65.5°F	59.9°F	61.7°F
Apr 16	65.3°F	60.3°F	61.5°F
Apr 17	65.4°F	60.4°F	61.6°F
Apr 18	64.4°F	60.7°F	61.1°F
Apr 19	64.5°F	60.8°F	61.2°F
Apr 20	64.5°F	60.8°F	61.1°F
Apr 21	64.3°F	60.5°F	61.0°F
Apr 22	64.3°F	60.2°F	60.9°F
Apr 23	64.1°F	59.6°F	60.7°F
Apr 24	64.2°F	59.4°F	60.9°F
Apr 25	64.4°F	59.5°F	61.1°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, 68.2°F in Summer, and 65.9°F in Autumn.

Popular neighboring cities and resorts

City	Water temperature*	Distance**
Tijuana	63.1°F	17mi
Oceanside	65.3°F	35mi
Laguna Beach	65.0°F	67mi

* current water temperature in this city

** straight line distance from San Diego