Current sea water temperature:
+62.6°F
| Minimum sea water temperature in December: | 65.1°F |
| Maximum sea water temperature in December: | 56.1°F |
| Average sea water temperature in December: | 60.7°F |
| more information | |
14 days
forecast
forecast
| San Diego |
monthly
weather
weather
| San Diego |
Sea water temperature for the last 10 days:
| December 20 | 62.6°F | December 15 | 62.2°F |
| December 19 | 62.1°F | December 14 | 62.4°F |
| December 18 | 62.4°F | December 13 | 62.6°F |
| December 17 | 62.4°F | December 12 | 62.6°F |
| December 16 | 62.4°F | December 11 | 62.2°F |
Monthly sea water temperature, °F
When is the warmest sea in San Diego?
Based on the data about daily sea water temperature for the last three years the warmest sea in San Diego was noticed in August, September and July.
Monthly Sea Temperatures in San Diego, °F
Sea water temperature in August, °F
Show year:
2025
2024
2023
The average sea water temperature in August of 2025 was 68.9°F. The highest and lowest sea temperatures during the month were 72.3°F and 63.3°F.
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 67.3°F. The highest and lowest sea temperatures during the month were 70.5°F and 63.1°F.
Sea water temperature in July, °F
Show year:
2025
2024
2023
The average sea water temperature in July of 2025 was 66.0°F. The highest and lowest sea temperatures during the month were 69.3°F and 63.1°F.
current
weather
weather
| San Diego |
weather in
December
December
| San Diego |
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: 02:44
December 20, saturday
0300
57°F
NE
2 mph
2 mph
0600
55°F
NE
2 mph
2 mph
0900
57°F
NE
3 mph
3 mph
1200
63°F
NE
6 mph
6 mph
1500
63°F
NE
7 mph
7 mph
1800
61°F
N
5 mph
5 mph
2100
57°F
NE
3 mph
3 mph
December 21, sunday
0000
57°F
N
2 mph
2 mph
