Average Ocean Water Temperatures at San Diego

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The table below lists typical water temperatures for each month of the year in the ocean near San Diego in California.

The temperatures, given in both degrees Fahrenheit and degrees Celsius, are long-term averages.

The water is measured at Scripps Pier, just north of San Diego in La Jolla.

The ocean off San Diego reaches its warmest point of the year in August when the temperature averages 68 degrees Fahrenheit (20 degrees Celsius).

The coolest month is February, when the sea temperature is normally at 57 °F (14 ° C).

San Diego's average seawater temperature
Period °F °C
January 58 14
February 57 14
March 58 14
April 1-15 59 15
April 16-30 60 16
May 1-15 61 16
May 16-31 63 17
June 1-15 64 18
June 16-30 65 18
July 1-15 66 19
July 16-31 67 19
August 1-15 68 20
August 16-31 68 20
September 1-15 66 19
September 16-30 66 19
October 1-15 65 18
October 16-31 63 17
November 61 16
December 59 15
Annual Average 62 17
Reference

National Oceanographic Data Center. NODC Coastal Water Temperature Guide (CWTG).

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