Monthly Charleston Harbor water temperature chart
The bar chart below shows the average monthly sea temperatures at Charleston Harbor over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 17.2 | 16.6 | 16.8 | 19.6 | 22.7 | 26.2 | 28.3 | 28.6 | 27.6 | 25.5 | 22.2 | 19.0 |
| °F | 63 | 61.9 | 62.2 | 67.3 | 72.9 | 79.2 | 82.9 | 83.5 | 81.7 | 77.9 | 72 | 66.2 |
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 | 15.3 | 14.7 | 15.2 | 16.8 | 19.6 | 24.2 | 26.9 | 27.2 | 26.3 | 23 | 20.4 | 16.9 |
| Max °C | 19.2 | 18.5 | 18.5 | 22.5 | 25.9 | 28.3 | 29.8 | 30 | 28.9 | 28 | 24 | 21.2 |
| Min °F | 61.1 | 60 | 60.6 | 64.5 | 69.8 | 77.2 | 81.5 | 82.1 | 80.4 | 75.4 | 70.2 | 64.1 |
| Max °F | 65 | 63.8 | 63.9 | 70.2 | 76.1 | 81.3 | 84.4 | 84.9 | 83 | 80.4 | 73.8 | 68.4 |