Sea Temperature in San Diego in December

Complete information on the sea temperature range in the Pacific Ocean in San Diego in December. Historical daily data. Climate details for December. Tips on swimming conditions and beach relaxation in San Diego. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature Range in San Diego in December

57°F

MINIMUN

61°F

AVERAGE

64°F

MAXIMUM

Historical Data of Water Temperature in December in San Diego

Water Temperature Chart for Pacific Ocean in San Diego in December

Sea Temperature Table in San Diego in December Over the Past Years

Day	2024	2023	2022	Average
Dec 1	59°C	63°C	61°C	61°C
Dec 2	59°C	63°C	59°C	61°C
Dec 3	59°C	61°C	59°C	60°C
Dec 4	57°C	63°C	59°C	60°C
Dec 5	59°C	63°C	59°C	60°C
Dec 6	57°C	63°C	61°C	61°C
Dec 7	57°C	61°C	61°C	60°C
Dec 8	57°C	57°C	63°C	59°C
Dec 9	57°C	57°C	63°C	59°C
Dec 10	57°C	61°C	59°C	60°C
Dec 11	57°C	63°C	59°C	60°C
Dec 12	57°C	63°C	59°C	60°C
Dec 13	55°C	63°C	59°C	60°C
Dec 14	55°C	63°C	57°C	59°C
Dec 15	55°C	61°C	57°C	59°C
Dec 16	55°C	61°C	59°C	59°C
Dec 17	57°C	61°C	57°C	59°C
Dec 18	57°C	61°C	57°C	59°C
Dec 19	55°C	61°C	59°C	59°C
Dec 20	55°C	63°C	59°C	59°C
Dec 21	55°C	61°C	57°C	58°C
Dec 22	55°C	61°C	59°C	59°C
Dec 23	55°C	63°C	57°C	59°C
Dec 24	55°C	63°C	59°C	60°C
Dec 25	55°C	63°C	59°C	59°C
Dec 26	55°C	63°C	59°C	60°C
Dec 27	55°C	63°C	57°C	59°C
Dec 28	55°C	63°C	57°C	59°C
Dec 29	57°C	63°C	57°C	59°C
Dec 30	55°C	63°C	59°C	60°C

San Diego Climate and Swimming Opportunities in December

66°F

Average Day Air Temperature

48°F

Average Night Air Temperature

2 in

Precipitation Amount per Month

5 days

Number of Rainy Days

10 hrs

Daylight
per Day

7 hrs

Sunshine
per Day

6 mph

Average Wind Speed

66%

Average
humidity

San Diego lies within the California in United States. The average daytime temperature in San Diego in December is 66°F (19°C), while the nighttime average is 48°F (9°C). There are typically five rainy days during the month, with a total precipitation of 1.7 inches (44 mm). The daylight duration in December in San Diego is 10 hours, with an average of 7 hours of sunshine per day. The average wind speed in December is 6 mph (9 km/h), and the humidity level is around 66%.

The water temperature in San Diego in December ranges from 57°F to 61°F (14°C to 16°C). At the beginning of the month, the average temperature is around 61°F (16°C), shifting to 59°F (15°C) by mid-December and reaching 59°F (15°C) in the last ten days. Overall, the average sea temperature in San Diego for December is 59°F (15°C). Ideal conditions for a refreshing swim, though some may still find it a bit cool.

Sea Temperature in December in Nearby Cities

Frequently Asked Questions About Water Temperatures in December in San Diego

What is the sea temperature in San Diego in December?

The water temperature in the Pacific Ocean in San Diego in December ranges from 57°F to 61°F (14°C to 16°C).

Is it possible to swim in the Pacific Ocean in San Diego in December?

The average sea temperature in San Diego in December is 59°F (15°C), and the air temperature is 66°F (19°C), so ideal conditions for a refreshing swim, though some may still find it a bit cool.