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) | 19 (66.3) |
| Carlsbad | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 19.3 (66.7) |
| Coronado | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 18.6 (65.5) |
| Del Mar | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 19.2 (66.6) |
| Huntington Beach | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 19.1 (66.4) |
| La Jolla | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 19.3 (66.7) |
| Laguna Beach | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 19 (66.2) |
| Lake Tahoe | 11.2 (52.2) | 11.9 (53.4) | 12.6 (54.7) | 7.8 (46.1) |
| Long Beach | 14.6 (58.3) | 15.5 (59.9) | 16.4 (61.5) | 19.6 (67.3) |
| Los Angeles | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 18.4 (65.1) |
| Malibu | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 17.9 (64.1) |
| Malibu Beach | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 17.9 (64.2) |
| Mission Bay | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 18.9 (66) |
| Monterey | 12.2 (54) | 13.1 (55.6) | 14 (57.2) | 15 (58.9) |
| Newport Beach | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 19.1 (66.4) |
| Ocean Beach | 11.2 (52.2) | 12.4 (54.3) | 13.6 (56.5) | 15.1 (59.2) |
| Oceanside | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 19.2 (66.6) |
| San Clemente | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 19 (66.3) |
| San Diego | 14.6 (58.2) | 15.8 (60.4) | 17.1 (62.7) | 18.5 (65.3) |
| San Francisco | 11.2 (52.2) | 12.4 (54.3) | 13.6 (56.5) | 15.1 (59.2) |
| San Onofre | 14.6 (58.3) | 15.7 (60.3) | 16.8 (62.2) | 19 (66.2) |
| Santa Barbara | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 17.5 (63.6) |
| Santa Catalina Island | 14.6 (58.3) | 15.5 (59.9) | 16.4 (61.5) | 19.5 (67) |
| Santa Cruz | 12.1 (53.7) | 13.1 (55.6) | 14.2 (57.5) | 14.8 (58.7) |
| Santa Monica | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 17.9 (64.3) |
| Tomales Bay | 11 (51.7) | 12.1 (53.8) | 13.3 (55.9) | 13.8 (56.9) |
| Ventura | 13.7 (56.7) | 14.6 (58.3) | 15.5 (59.9) | 17.9 (64.2) |