In September warmest sea in California is usually observed in the following locations: Fremont, San Jose, Oakland.
Table below shows the average sea water temperature for marine resorts of California in September for the last three years.
| Place name | September 2023 | September 2022 | September 2021 |
|---|---|---|---|
| Fremont | 68.7°F | 68.8°F | 68.5°F |
| San Jose | 68.6°F | 68.6°F | 68.3°F |
| Oakland | 66.7°F | 67.3°F | 66.4°F |
| Yosemite | 65.6°F | 65.6°F | 65.6°F |
| Incline Village | 65.3°F | 67.3°F | 65.6°F |
| Lake Tahoe | 64.9°F | 66.9°F | 65.3°F |
| South Lake Tahoe | 64.9°F | 66.9°F | 64.8°F |
| Stateline | 64.9°F | 66.9°F | 64.9°F |
| San Francisco | 64.7°F | 64.7°F | 64.9°F |
| Sausalito | 64.2°F | 64.3°F | 64.4°F |
| Santa Cruz | 61.1°F | 61.0°F | 61.5°F |
| Monterey | 60.6°F | 59.9°F | 60.8°F |
Charts below show average sea water temperature for California resorts with the warmest sea in September.
You can also check other months of the year to see sea temperature of California resorts at that time.
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