Monthly Nantucket water temperature chart
The bar chart below shows the average monthly sea temperatures at Nantucket over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 5.1 | 3.4 | 3.6 | 6.6 | 10.2 | 14.8 | 19.0 | 20.2 | 18.7 | 15.8 | 11.7 | 8.2 |
| °F | 41.2 | 38.1 | 38.5 | 43.9 | 50.4 | 58.6 | 66.2 | 68.4 | 65.7 | 60.4 | 53.1 | 46.8 |
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 | 2.9 | 2 | 1.6 | 3.6 | 7.1 | 11 | 16.1 | 18.5 | 17.2 | 12.7 | 9.6 | 5.1 |
| Max °C | 7.4 | 4.9 | 5.7 | 9.7 | 13.3 | 18.6 | 21.9 | 21.9 | 20.3 | 18.9 | 13.9 | 11.4 |
| Min °F | 39 | 36.7 | 36.5 | 40.9 | 47.3 | 54.8 | 63.3 | 66.7 | 64.2 | 57.3 | 51 | 43.7 |
| Max °F | 43.5 | 39.6 | 40.6 | 47 | 53.5 | 62.4 | 69.1 | 70.1 | 67.3 | 63.5 | 55.3 | 50 |