Monthly Llansteffan water temperature chart
The bar chart below shows the average monthly sea temperatures at Llansteffan over the year.
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| °C | 9.0 | 8.7 | 8.4 | 9.6 | 11.2 | 13.4 | 15.4 | 16.3 | 16.2 | 14.9 | 13.4 | 11.2 |
| °F | 48.2 | 47.7 | 47.1 | 49.3 | 52.2 | 56.1 | 59.7 | 61.3 | 61.2 | 58.8 | 56.1 | 52.2 |
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 | 7.6 | 7.6 | 7.6 | 8.2 | 10.1 | 11.8 | 13.8 | 15.5 | 15.4 | 13.8 | 12.3 | 9.7 |
| Max °C | 10.4 | 9.8 | 9.3 | 11 | 12.3 | 15.1 | 17 | 17.2 | 17.1 | 16.1 | 14.6 | 12.8 |
| Min °F | 46.8 | 46.6 | 46.3 | 47.9 | 51.1 | 54.5 | 58.1 | 60.5 | 60.4 | 57.7 | 55 | 50.7 |
| Max °F | 49.6 | 48.8 | 48 | 50.7 | 53.3 | 57.8 | 61.3 | 62.2 | 62.1 | 60 | 57.3 | 53.8 |