California water temperature in December
| Min (°C/°F) | Avg (°C/°F) | Max (°C/°F) | Current (°C/°F) | |
|---|---|---|---|---|
| Blacks Beach | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 17.5 (63.5) |
| Carlsbad | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 17.5 (63.5) |
| Coronado | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 17.3 (63.1) |
| Del Mar | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 17.5 (63.6) |
| Huntington Beach | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 17.4 (63.2) |
| La Jolla | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 17.6 (63.6) |
| Laguna Beach | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 17.3 (63.2) |
| Lake Tahoe | 11.2 (52.2) | 11.9 (53.4) | 12.6 (54.7) | 6.3 (43.4) |
| Long Beach | 14.6 (58.3) | 15.5 (59.9) | 16.4 (61.5) | 17.6 (63.8) |
| Los Angeles | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 17.3 (63.1) |
| Malibu | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 17 (62.6) |
| Malibu Beach | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 17.1 (62.7) |
| Mission Bay | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 17.4 (63.3) |
| Monterey | 12.2 (54) | 13.1 (55.6) | 14 (57.2) | 13.8 (56.9) |
| Newport Beach | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 17.3 (63.2) |
| Ocean Beach | 11.2 (52.2) | 12.4 (54.3) | 13.6 (56.5) | 12.9 (55.1) |
| Oceanside | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 17.5 (63.4) |
| San Clemente | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 17.5 (63.5) |
| San Diego | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 17.2 (63) |
| San Francisco | 11.2 (52.2) | 12.4 (54.3) | 13.6 (56.5) | 12.7 (54.9) |
| San Onofre | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 17.4 (63.4) |
| Santa Barbara | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 16.9 (62.5) |
| Santa Catalina Island | 14.6 (58.3) | 15.5 (59.9) | 16.4 (61.5) | 17.4 (63.3) |
| Santa Cruz | 12.1 (53.7) | 13.1 (55.6) | 14.2 (57.5) | 13.7 (56.7) |
| Santa Monica | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 17.6 (63.6) |
| Tomales Bay | 11 (51.7) | 12.1 (53.8) | 13.3 (55.9) | 12.9 (55.3) |
| Ventura | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 16.6 (61.8) |