Measurements:
°C
°F
CURRENT WEATHER
06:02
San Diego
70°F
N 6 mph
Feels like: 70°F
Precip: 9%
World Resorts USA San Diego Weather

7 Day Weather Forecast

09.15
tue
DAY
74°F
NE 8 mph
precip
6%
NIGHT
72°F
E 4 mph
precip
7%
09.16
wed
DAY
74°F
NE 7 mph
precip
5%
NIGHT
70°F
SE 4 mph
precip
7%
09.17
thu
DAY
74°F
E 9 mph
precip
6%
NIGHT
72°F
SE 6 mph
precip
7%
09.18
fri
DAY
76°F
E 8 mph
precip
4%
NIGHT
72°F
SE 6 mph
precip
6%
09.19
sat
DAY
74°F
E 8 mph
precip
5%
NIGHT
72°F
E 3 mph
precip
8%
09.20
sun
DAY
74°F
E 8 mph
precip
7%
NIGHT
72°F
SE 5 mph
precip
24%
09.21
mon
DAY
74°F
E 6 mph
precip
15%
NIGHT
72°F
SE 6 mph
precip
24%

San Diego Sea Water Temperature in September, °F

Select Year: 2026 2025 2024

The average sea surface temperature in September 2026 for San Diego was 23.0°F. The maximum and minimum values were 22.2°F and 23.5°F respectively.

San Diego on the Weather Map

Best Time to Visit San Diego
The most sunny months:
November 20 days
July 20 days
August 20 days
The most warm months:
August 82.5 °F
September 81.0 °F
July 79.4 °F
Warmest sea temperature:
August 72.2 °F
September 71.1 °F
July 70.9 °F
The most cold months:
January 65.1 °F
December 65.2 °F
February 65.3 °F
The most rainy months:
March 2 days
February 2 days
January 2 days
The most windy months:
May 7 mph
April 7 mph
March 7 mph
more details