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 18.15°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.

64.7

°F

May 11, 01:17

Trend:

stable

Yesterday:

64.2°F

Tomorrow:

64.7°F

Sunrise:

05:53

Sunset:

19:38

Day Length:

13 h. 45 min.

San Diego in May

Minimum:

56.2°F

Average:

59.6°F

Maximum:

62.5°F

Sea water temperature in San Diego today

As of now, in San Diego, the water temperature is 64.7°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 0.8°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 stay about the same.

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 66.9°F on 2020, while the historical minimum was 62.4°F on 2017.

latest data

last year

Over the past two weeks, the water temperature has closely aligned with historical averages for those days. The forecast for the upcoming week shows a gradual cooling trend. The average temperature is expected to be 64.3°F, the minimum temperature may reach 64.1°F, and the maximum might stay at 64.7°F.

Daily water temperature in San Diego

Date	Current Year actual* / forecast**	last year	10 years average
Apr 27	63.7°F	59.4°F	61.5°F
Apr 28	63.8°F	59.9°F	61.7°F
Apr 29	63.4°F	60.1°F	62.0°F
Apr 30	62.8°F	60.4°F	62.0°F
May 1	62.5°F	60.4°F	62.1°F
May 2	62.2°F	60.4°F	62.2°F
May 3	62.3°F	60.6°F	62.6°F
May 4	63.0°F	60.5°F	63.0°F
May 5	62.6°F	59.3°F	63.2°F
May 6	62.8°F	59.9°F	63.2°F
May 7	62.6°F	61.0°F	63.0°F
May 8	63.2°F	60.8°F	63.1°F
May 9	63.8°F	61.3°F	63.4°F
May 10	64.2°F	61.8°F	63.8°F
May 11	64.7°F	61.9°F	63.9°F
May 12	64.7°F	61.8°F	63.9°F
May 13	64.4°F	62.2°F	63.7°F
May 14	64.4°F	62.2°F	63.6°F
May 15	64.2°F	62.1°F	63.5°F
May 16	64.2°F	62.1°F	63.4°F
May 17	64.1°F	62.2°F	63.4°F
May 18	64.1°F	62.0°F	63.3°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	64.0°F	17mi
Oceanside	65.1°F	35mi
Laguna Beach	65.2°F	67mi

* current water temperature in this city

** straight line distance from San Diego