Monthly Alderney water temperature chart
The bar chart below shows the average monthly sea temperatures at Alderney over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 10.3 | 9.8 | 9.4 | 10.3 | 11.7 | 13.7 | 15.6 | 16.9 | 16.9 | 16.1 | 14.4 | 12.2 |
| °F | 50.5 | 49.6 | 48.9 | 50.5 | 53.1 | 56.7 | 60.1 | 62.4 | 62.4 | 61 | 57.9 | 54 |
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 | 8.6 | 8.5 | 8 | 9.1 | 10.4 | 11.7 | 14.3 | 15.8 | 15.9 | 15.2 | 13.1 | 10.8 |
| Max °C | 12.1 | 11.1 | 10.8 | 11.5 | 13 | 15.7 | 17 | 18.1 | 18 | 17.1 | 15.7 | 13.6 |
| Min °F | 48.8 | 48.3 | 47.5 | 49.3 | 51.8 | 54.7 | 58.8 | 61.3 | 61.4 | 60.1 | 56.6 | 52.6 |
| Max °F | 52.3 | 50.9 | 50.3 | 51.7 | 54.4 | 58.7 | 61.5 | 63.6 | 63.5 | 62 | 59.2 | 55.4 |