24.09
thu
thu
Day

73°F
E 8 mph
Precip.
9%
9%
Night

72°F
SE 3 mph
Precip.
8%
8%
25.09
fri
fri
Day

77°F
SE 9 mph
Precip.
5%
5%
Night

73°F
SE 4 mph
Precip.
20%
20%
26.09
sat
sat
Day

79°F
E 9 mph
Precip.
5%
5%
Night

73°F
SE 4 mph
Precip.
20%
20%
27.09
sun
sun
Day

77°F
E 9 mph
Precip.
3%
3%
Night

70°F
SE 7 mph
Precip.
4%
4%
28.09
mon
mon
Day

73°F
E 6 mph
Precip.
2%
2%
Night

70°F
SE 4 mph
Precip.
4%
4%
29.09
tue
tue
Day

79°F
SE 8 mph
Precip.
1%
1%
Night

75°F
SE 6 mph
Precip.
3%
3%
30.09
wed
wed
Day

84°F
SE 7 mph
Precip.
1%
1%
Night

77°F
SE 6 mph
Precip.
3%
3%
01.10
thu
thu
Day

79°F
SE 8 mph
Precip.
2%
2%
Night

77°F
SE 6 mph
Precip.
4%
4%
02.10
fri
fri
Day

77°F
E 9 mph
Precip.
3%
3%
Night

72°F
SE 6 mph
Precip.
6%
6%
03.10
sat
sat
Day

77°F
SE 8 mph
Precip.
2%
2%
Night

73°F
SE 6 mph
Precip.
5%
5%
04.10
sun
sun
Day

77°F
SE 9 mph
Precip.
3%
3%
Night

73°F
SE 7 mph
Precip.
5%
5%
05.10
mon
mon
Day

75°F
SE 9 mph
Precip.
3%
3%
Night

73°F
SE 5 mph
Precip.
5%
5%
06.10
tue
tue
Day

77°F
E 7 mph
Precip.
2%
2%
Night

75°F
SE 8 mph
Precip.
4%
4%
07.10
wed
wed
Day

81°F
SE 7 mph
Precip.
2%
2%
Night

79°F
SE 6 mph
Precip.
3%
3%
sea water
temperature
temperature
| San Diego |
monthly
weather
weather
| San Diego |
current
weather
weather
| San Diego |
7 days
forecast
forecast
| San Diego |
Sea water temperature in September, °F
Show year:
2026
2025
2024
The average sea water temperature in September of 2026 was 73.7°F. The highest and lowest sea temperatures during the month were 75.0°F and 72.0°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 65.8°F. The highest and lowest sea temperatures during the month were 67.6°F and 63.1°F.
Air temperature in San Diego, °F
Precipitation total in San Diego, in.
* Charts above show average data for the last 3 years.
Best time for vacation in San Diego
San Diego on a weather map
Places in USA:
Name
°F
24 Hours Forecast
San Diego
Local time: 15:10
September 24, thursday
1800

72°F
E
6 mph
6 mph
2100

72°F
SE
7 mph
7 mph
September 25, friday
0000

72°F
SE
3 mph
3 mph
0300

72°F
SE
6 mph
6 mph
0600

72°F
SE
4 mph
4 mph
0900

73°F
SE
7 mph
7 mph
1200

77°F
SE
9 mph
9 mph
1500

75°F
SE
9 mph
9 mph




























