Best time to swim in Wales Sea temperature by month
Do you want to go to the seaside in Wales? But when should you go to be sure to enjoy good sea water temperature and be able to swim for a long time? Now or another month during the year? On this page, find the sea temperature by month in Wales.
Swimming in Wales by month
Discover swimming conditions in detail in Wales by month below. Click on the links for each month to see details about the sea temperature in the cities of: Cardiff, Conwy, Holyhead, Pembrokeshire and Snowdonia National Park.
| Month | Average Sea temperature | Our opinion |
|---|---|---|
| January | 46°F to 49°F | freezing swimming |
| February | 46°F to 49°F | freezing swimming |
| March | 46°F to 48°F | freezing swimming |
| April | 48°F to 50°F | freezing swimming |
| May | 51°F to 53°F | freezing swimming |
| June | 55°F to 58°F | freezing swimming |
| July | 58°F to 61°F | cold swimming* |
| August | 60°F to 63°F | cool swimming* |
| September | 59°F to 63°F | cold swimming |
| October | 58°F to 60°F | cold swimming* |
| November | 55°F to 57°F | freezing swimming |
| December | 50°F to 53°F | freezing swimming |
* in at least part of the area.
Where and when should you swim in Wales?
Best time to swim in Cardiff
No month is favorable as far as sea temperature for swimming in Cardiff.
Best time to swim in Conwy
No month is favorable as far as sea temperature for swimming in Conwy.
Best time to swim in Holyhead
No month is favorable as far as sea temperature for swimming in Holyhead.
Best time to swim in Pembrokeshire
No month is favorable as far as sea temperature for swimming in Pembrokeshire.
Best time to swim in Snowdonia National Park
No month is favorable as far as sea temperature for swimming in Snowdonia National Park.
Other cities and places in Wales:
Water temperatures in Wales over the entire year
On this chart, we show you the variation of the average sea water temperature in Wales for the cities of: Cardiff, Conwy, Holyhead, Pembrokeshire and Snowdonia National Park.