Monthly Hermanus water temperature chart
The bar chart below shows the average monthly sea temperatures at Hermanus over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 21.0 | 20.9 | 21.1 | 19.1 | 17.1 | 16.3 | 15.4 | 15.2 | 15.7 | 16.7 | 18.0 | 19.7 |
| °F | 69.8 | 69.6 | 70 | 66.4 | 62.8 | 61.3 | 59.7 | 59.4 | 60.3 | 62.1 | 64.4 | 67.5 |
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 | 19.4 | 19.7 | 19.5 | 17.2 | 15.7 | 15.4 | 14.7 | 14.5 | 14.5 | 15.7 | 16.5 | 18.4 |
| Max °C | 22.7 | 22.1 | 22.7 | 21.1 | 18.5 | 17.3 | 16.2 | 16 | 16.9 | 17.8 | 19.6 | 21.1 |
| Min °F | 68.2 | 68.4 | 68.4 | 64.5 | 61.4 | 60.4 | 59 | 58.7 | 59.1 | 61.1 | 62.9 | 66.2 |
| Max °F | 71.5 | 70.8 | 71.6 | 68.4 | 64.2 | 62.3 | 60.5 | 60.2 | 61.5 | 63.2 | 66 | 68.9 |