Monthly Portland water temperature chart
The bar chart below shows the average monthly sea temperatures at Portland over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 17.0 | 17.2 | 16.9 | 16.3 | 15.8 | 15.5 | 15.0 | 14.4 | 14.0 | 14.2 | 15.3 | 16.1 |
| °F | 62.6 | 63 | 62.4 | 61.3 | 60.4 | 59.9 | 59 | 57.9 | 57.2 | 57.6 | 59.5 | 61 |
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 | 15.1 | 15.6 | 15.8 | 15.3 | 14.9 | 14.2 | 13.9 | 13.5 | 13.1 | 13.1 | 13.9 | 13.9 |
| Max °C | 19 | 18.9 | 18.1 | 17.4 | 16.7 | 16.8 | 16.2 | 15.4 | 14.9 | 15.3 | 16.7 | 18.3 |
| Min °F | 60.7 | 61.4 | 61.3 | 60.3 | 59.5 | 58.6 | 57.9 | 57 | 56.3 | 56.5 | 58.1 | 58.8 |
| Max °F | 64.6 | 64.7 | 63.6 | 62.4 | 61.3 | 61.2 | 60.2 | 58.9 | 58.1 | 58.7 | 60.9 | 63.2 |