In August warmest sea in California is usually observed in the following locations: Yosemite, South Lake Tahoe, Stateline.
Table below shows the average sea water temperature for marine resorts of California in August for the last three years.
| Place name | August 2025 | August 2024 | August 2023 |
|---|---|---|---|
| Yosemite | 69.3°F | 69.3°F | 69.4°F |
| South Lake Tahoe | 68.1°F | 67.8°F | 68.3°F |
| Stateline | 68.1°F | 67.8°F | 68.3°F |
| Incline Village | 68.0°F | 67.8°F | 68.3°F |
| Lake Tahoe | 67.6°F | 67.3°F | 68.0°F |
| Fremont | 67.3°F | 67.7°F | 69.0°F |
| San Jose | 67.0°F | 67.5°F | 68.7°F |
| Oakland | 66.1°F | 65.2°F | 65.9°F |
| San Francisco | 63.8°F | 62.4°F | 63.7°F |
| Sausalito | 63.7°F | 62.5°F | 63.4°F |
| Monterey | 59.7°F | 57.2°F | 59.8°F |
| Santa Cruz | 59.2°F | 57.1°F | 61.1°F |
Charts below show average sea water temperature for California resorts with the warmest sea in August.
You can also check other months of the year to see sea temperature of California resorts at that time.
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