California water temperature in April
| Min (°C/°F) | Avg (°C/°F) | Max (°C/°F) | Current (°C/°F) | |
|---|---|---|---|---|
| Blacks Beach | 15.1 (59.1) | 15.9 (60.6) | 16.8 (62.2) | 21 (69.8) |
| Carlsbad | 13.9 (56.9) | 15.3 (59.5) | 16.8 (62.2) | 21.5 (70.7) |
| Coronado | 15.1 (59.1) | 15.9 (60.6) | 16.8 (62.2) | 20.2 (68.3) |
| Del Mar | 15.1 (59.1) | 15.9 (60.6) | 16.8 (62.2) | 21.2 (70.2) |
| Huntington Beach | 13.9 (56.9) | 15.3 (59.5) | 16.8 (62.2) | 20.4 (68.8) |
| La Jolla | 15.1 (59.1) | 15.9 (60.6) | 16.8 (62.2) | 21 (69.8) |
| Laguna Beach | 13.9 (56.9) | 15.3 (59.5) | 16.8 (62.2) | 20.6 (69) |
| Lake Tahoe | 9.6 (49.2) | 10.6 (51.1) | 11.7 (53) | 9.2 (48.6) |
| Long Beach | 13 (55.4) | 14.8 (58.6) | 16.6 (61.9) | 20.8 (69.5) |
| Los Angeles | 11.8 (53.2) | 13.3 (55.9) | 14.9 (58.7) | 20.8 (69.4) |
| Malibu | 11.8 (53.2) | 13.3 (55.9) | 14.9 (58.7) | 20.9 (69.6) |
| Malibu Beach | 11.8 (53.2) | 13.3 (55.9) | 14.9 (58.7) | 21 (69.8) |
| Mission Bay | 15.1 (59.1) | 15.9 (60.6) | 16.8 (62.2) | 20.6 (69.1) |
| Monterey | 10.5 (50.9) | 12.1 (53.8) | 13.7 (56.7) | 16 (60.8) |
| Newport Beach | 13.9 (56.9) | 15.3 (59.5) | 16.8 (62.2) | 20.5 (68.8) |
| Ocean Beach | 9.6 (49.3) | 11.4 (52.5) | 13.2 (55.8) | 15.9 (60.6) |
| Oceanside | 13.9 (56.9) | 15.3 (59.5) | 16.8 (62.2) | 21.4 (70.5) |
| San Clemente | 13.9 (56.9) | 15.3 (59.5) | 16.8 (62.2) | 21.1 (69.9) |
| San Diego | 15.1 (59.1) | 15.9 (60.6) | 16.8 (62.2) | 20.2 (68.3) |
| San Francisco | 9.6 (49.3) | 11.4 (52.5) | 13.2 (55.8) | 15.5 (59.9) |
| San Onofre | 13.9 (56.9) | 15.3 (59.5) | 16.8 (62.2) | 21.1 (70) |
| Santa Barbara | 11.4 (52.5) | 12.9 (55.2) | 14.4 (57.9) | 19.2 (66.6) |
| Santa Catalina Island | 13 (55.4) | 14.8 (58.6) | 16.6 (61.9) | 21.2 (70.1) |
| Santa Cruz | 10.6 (51.1) | 12.2 (54) | 13.8 (56.8) | 16.2 (61.2) |
| Santa Monica | 11.8 (53.2) | 13.3 (55.9) | 14.9 (58.7) | 21.4 (70.5) |
| Tomales Bay | 9.5 (49.1) | 11.1 (52) | 12.7 (54.9) | 15 (58.9) |
| Ventura | 11.4 (52.5) | 12.9 (55.2) | 14.4 (57.9) | 19.4 (66.9) |