Monthly Ketchikan water temperature chart
The bar chart below shows the average monthly sea temperatures at Ketchikan over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 5.9 | 5.6 | 5.4 | 6.3 | 8.3 | 10.8 | 12.1 | 12.8 | 11.4 | 9.6 | 8.2 | 7.1 |
| °F | 42.6 | 42.1 | 41.7 | 43.3 | 46.9 | 51.4 | 53.8 | 55 | 52.5 | 49.3 | 46.8 | 44.8 |
Monthly average max / min water temperatures
The graph below shows the range of monthly water temperatures over several years.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min °C | 4.7 | 5 | 4.3 | 4.6 | 6.1 | 8.2 | 10 | 10.6 | 10 | 8.7 | 7.3 | 6.3 |
| Max °C | 7.1 | 6.3 | 6.5 | 8.1 | 10.6 | 13.5 | 14.2 | 15 | 12.9 | 10.5 | 9.2 | 8 |
| Min °F | 41.4 | 41.5 | 40.6 | 41.6 | 44.7 | 48.8 | 51.7 | 52.8 | 51.1 | 48.4 | 45.9 | 44 |
| Max °F | 43.8 | 42.8 | 42.8 | 45.1 | 49.2 | 54.1 | 55.9 | 57.2 | 54 | 50.2 | 47.8 | 45.7 |