Monthly South Portland water temperature chart
The bar chart below shows the average monthly sea temperatures at South Portland over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 4.9 | 3.6 | 3.2 | 5.1 | 7.8 | 12.6 | 16.6 | 17.8 | 16.1 | 12.8 | 9.6 | 7.2 |
| °F | 40.8 | 38.5 | 37.8 | 41.2 | 46 | 54.7 | 61.9 | 64 | 61 | 55 | 49.3 | 45 |
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 | 3.3 | 2.2 | 1.8 | 3.3 | 5 | 9.8 | 14.3 | 16.3 | 14 | 9.7 | 8 | 5.2 |
| Max °C | 6.5 | 5.1 | 4.7 | 7 | 10.7 | 15.4 | 19 | 19.4 | 18.2 | 15.9 | 11.2 | 9.3 |
| Min °F | 39.2 | 37.1 | 36.4 | 39.4 | 43.2 | 51.9 | 59.6 | 62.5 | 58.9 | 51.9 | 47.7 | 43 |
| Max °F | 42.4 | 40 | 39.3 | 43.1 | 48.9 | 57.5 | 64.3 | 65.6 | 63.1 | 58.1 | 50.9 | 47.1 |