In May 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 May for the last three years.
| Place name | May 2025 | May 2024 | May 2023 |
|---|---|---|---|
| Fremont | 62.3°F | 63.1°F | 61.7°F |
| San Jose | 62.0°F | 62.9°F | 61.4°F |
| Oakland | 61.3°F | 58.3°F | 58.5°F |
| San Francisco | 58.5°F | 57.3°F | 56.8°F |
| Sausalito | 58.4°F | 57.9°F | 57.7°F |
| Santa Cruz | 55.1°F | 54.4°F | 55.9°F |
| Monterey | 54.8°F | 55.1°F | 55.2°F |
| Yosemite | 54.4°F | 54.4°F | 54.2°F |
| South Lake Tahoe | 51.5°F | 52.5°F | 53.6°F |
| Stateline | 51.4°F | 52.3°F | 53.5°F |
| Incline Village | 51.2°F | 51.8°F | 53.5°F |
| Lake Tahoe | 50.7°F | 51.1°F | 52.8°F |
Charts below show average sea water temperature for California resorts with the warmest sea in May.
You can also check other months of the year to see sea temperature of California resorts at that time.
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