In October warmest sea in California is usually observed in the following locations: Oakland, Fremont, San Jose.
Table below shows the average sea water temperature for marine resorts of California in October for the last three years.
| Place name | October 2026 | October 2025 | October 2024 |
|---|---|---|---|
| Oakland | 65.7°F | 65.5°F | 64.4°F |
| Fremont | 64.4°F | 65.1°F | 67.1°F |
| San Jose | 64.1°F | 64.9°F | 67.1°F |
| Monterey | 63.9°F | 60.9°F | 58.0°F |
| San Francisco | 63.1°F | 63.8°F | 62.1°F |
| Santa Cruz | 63.0°F | 60.7°F | 59.0°F |
| Sausalito | 62.8°F | 63.2°F | 61.8°F |
| Incline Village | 60.6°F | 59.4°F | 61.1°F |
| South Lake Tahoe | 60.4°F | 59.2°F | 60.8°F |
| Stateline | 60.4°F | 59.2°F | 60.9°F |
| Lake Tahoe | 60.3°F | 59.3°F | 60.8°F |
| Yosemite | 59.7°F | 56.9°F | 56.9°F |
Charts below show average sea water temperature for California resorts with the warmest sea in October.
You can also check other months of the year to see sea temperature of California resorts at that time.
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