Current sea water temperature:
+57.9°F
| Minimum sea water temperature in May: | 61.7°F |
| Maximum sea water temperature in May: | 51.6°F |
| Average sea water temperature in May: | 56.6°F |
| more information | |
14 days
forecast
forecast
| San Francisco |
monthly
weather
weather
| San Francisco |
Sea water temperature for the last 10 days:
| May 16 | 57.9°F | May 11 | 59.4°F |
| May 15 | 58.5°F | May 10 | 59.9°F |
| May 14 | 58.3°F | May 9 | 60.1°F |
| May 13 | 58.1°F | May 8 | 58.5°F |
| May 12 | 60.1°F | May 7 | 58.3°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:
2025
2024
2023
The average sea water temperature in August of 2025 was 63.8°F. The highest and lowest sea temperatures during the month were 65.1°F and 62.4°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
May
May
| 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: 16:04
May 16, saturday
1800
68°F
SE
21 mph
21 mph
2100
57°F
SE
15 mph
15 mph
May 17, sunday
0000
54°F
SE
9 mph
9 mph
0300
52°F
SE
6 mph
6 mph
0600
50°F
SE
4 mph
4 mph
0900
54°F
E
4 mph
4 mph
1200
59°F
E
8 mph
8 mph
1500
63°F
E
16 mph
16 mph
