In April 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 April for the last three years.
| Place name | April 2026 | April 2025 | April 2024 |
|---|---|---|---|
| Fremont | 61.8°F | 59.8°F | 60.4°F |
| San Jose | 61.7°F | 59.7°F | 60.3°F |
| Oakland | 60.9°F | 58.6°F | 58.2°F |
| San Francisco | 59.6°F | 56.4°F | 56.8°F |
| Sausalito | 59.5°F | 56.5°F | 57.0°F |
| Monterey | 57.9°F | 55.2°F | 55.5°F |
| Santa Cruz | 57.4°F | 54.6°F | 54.9°F |
| Incline Village | 48.5°F | 46.7°F | 44.1°F |
| Lake Tahoe | 48.0°F | 47.1°F | 43.7°F |
| Stateline | 48.0°F | 47.3°F | 43.9°F |
| South Lake Tahoe | 47.9°F | 47.2°F | 43.8°F |
| Yosemite | 45.6°F | 45.6°F | 45.7°F |
Charts below show average sea water temperature for California resorts with the warmest sea in April.
You can also check other months of the year to see sea temperature of California resorts at that time.
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