Catalina Channel — United States
Santa Catalina Island circumnavigation
- 74.9 km
- Distance
- Island loop from Avalon
Sentinel-2 cloudless 2016 · Copernicus Sentinel data
The crossing
Island loop from Avalon: 74.9 km between start and finish coasts. Our archive contains 14 crossings by swimmers from 3 countries.
Water temperature
Sea surface temperature measured by satellite at mid-route, daily values 2023–2025: the dot is the monthly mean, the bar spans the lowest to the highest. Highlighted: the months with most crossings.
Show the data as a table
| Month | Mean | Lowest | Highest |
|---|---|---|---|
| January | 15.2 °C (59 °F) | 14.1 °C (57 °F) | 17.2 °C (63 °F) |
| February | 14.8 °C (59 °F) | 13.4 °C (56 °F) | 16.1 °C (61 °F) |
| March | 14.4 °C (58 °F) | 12.9 °C (55 °F) | 16.8 °C (62 °F) |
| April | 15.2 °C (59 °F) | 13 °C (55 °F) | 16.8 °C (62 °F) |
| May | 16.8 °C (62 °F) | 15.6 °C (60 °F) | 18.4 °C (65 °F) |
| June | 19 °C (66 °F) | 17.4 °C (63 °F) | 20.9 °C (70 °F) |
| July | 20.4 °C (69 °F) | 18.6 °C (65 °F) | 22.1 °C (72 °F) |
| August | 21.1 °C (70 °F) | 19.8 °C (68 °F) | 22.2 °C (72 °F) |
| September | 20.7 °C (69 °F) | 18.7 °C (66 °F) | 22.4 °C (72 °F) |
| October | 19.6 °C (67 °F) | 17.3 °C (63 °F) | 21.2 °C (70 °F) |
| November | 17.3 °C (63 °F) | 14.9 °C (59 °F) | 19.1 °C (66 °F) |
| December | 16.4 °C (62 °F) | 15.1 °C (59 °F) | 17.7 °C (64 °F) |