Current sea water temperature:
+64.2°F
| Minimum sea water temperature in September: | 67.6°F |
| Maximum sea water temperature in September: | 55.8°F |
| Average sea water temperature in September: | 62.1°F |
| more information | |
14 days
forecast
forecast
| San Francisco |
monthly
weather
weather
| San Francisco |
Sea water temperature for the last 10 days:
| September 14 | 64.2°F | September 9 | 64.2°F |
| September 13 | 64.0°F | September 8 | 64.0°F |
| September 12 | 65.5°F | September 7 | 64.0°F |
| September 11 | 67.6°F | September 6 | 64.6°F |
| September 10 | 66.4°F | September 5 | 64.2°F |
Monthly sea water temperature, °F
When is the warmest sea in San Francisco?
Based on the data about daily sea water temperature for the last three years the warmest sea in San Francisco was noticed in September, August and October.
Monthly Sea Temperatures in San Francisco, °F
Sea water temperature in September, °F
Show year:
2025
2024
2023
The average sea water temperature in September of 2025 was 64.8°F. The highest and lowest sea temperatures during the month were 66.9°F and 62.2°F.
Sea water temperature in August, °F
Show year:
2026
2025
2024
The average sea water temperature in August of 2026 was 64.4°F. The highest and lowest sea temperatures during the month were 66.7°F and 62.1°F.
Sea water temperature in October, °F
Show year:
2025
2024
2023
The average sea water temperature in October of 2025 was 63.8°F. The highest and lowest sea temperatures during the month were 65.3°F and 62.4°F.
current
weather
weather
| San Francisco |
weather in
September
September
| San Francisco |
Best time for vacation in San Francisco
San Francisco on a weather map
Places in USA:
Name
°F
24 Hours Forecast
San Francisco
Local time: 13:41
September 14, monday
1500
64°F
E
14 mph
14 mph
1800
61°F
E
12 mph
12 mph
2100
59°F
E
8 mph
8 mph
September 15, tuesday
0000
59°F
NE
9 mph
9 mph
0300
59°F
NE
8 mph
8 mph
0600
57°F
NE
6 mph
6 mph
0900
59°F
N
6 mph
6 mph
1200
64°F
NE
9 mph
9 mph
