Swimming in Wales in march 2025 Sea temperature by city in march
Do you want to go to the beach in Wales in march 2025? Is it the right month to go for pleasant temperatures and staying in the water for a long time? The answer is on this page with the sea temperatures in march in Wales by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Wales in march 2025
Here, find the average sea temperature in Wales in march in several coastal cities.
48°F
min: 46°F / max: 50°F
Conwy
46°F
min: 44°F / max: 48°F
Holyhead
47°F
min: 46°F / max: 49°F
47°F
min: 46°F / max: 49°F
Snowdonia National Park
47°F
min: 45°F / max: 48°F
47°F
min: 46°F / max: 49°F
Aberystwyth
47°F
min: 46°F / max: 49°F
Amlwch
47°F
min: 45°F / max: 49°F
47°F
min: 46°F / max: 49°F
Barry
48°F
min: 46°F / max: 50°F
Buckley
46°F
min: 44°F / max: 48°F
Fishguard
48°F
min: 46°F / max: 49°F
46°F
min: 44°F / max: 48°F
Llanelli
48°F
min: 46°F / max: 49°F
Porthcawl
47°F
min: 46°F / max: 50°F
Where should you go swimming in Wales in the month of march?
Swimming in Wales in march is freezing
In march in Wales swimming conditions are generally the same everywhere.
Forget about swimming in Cardiff, Conwy, Holyhead, Pembrokeshire, Snowdonia National Park, Swansea, Aberystwyth, Amlwch, Barmouth, Barry, Buckley, Fishguard, Llandudno, Llanelli and Porthcawl in march! The water temperature is freezing, reaching as low as 46°F (and only 50°F at the best of times). Our advice: plan on sightseeing, and don't bring your beach towel!
Where to go swimming in Wales in march: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in march
Cardiff
| March | |||
| Average sea temperature | 48°F | ||
| Minimum sea temperature | 46°F | ||
| Maximum sea temperature | 50°F | ||
| Average outside temperature | 47°F | ||
| Maximum outside temperature | 52°F | ||
| Minimum outside temperature | 41°F | ||
| Precipitation | 1.7in | ||
| Number of days of precipitation | 2 jour(s) (8%) | ||
| Cloud cover | 51% | ||
| Our opinion | freezing swimming |
More information on swimming in Cardiff in march
Conwy
| March | |||
| Average sea temperature | 46°F | ||
| Minimum sea temperature | 44°F | ||
| Maximum sea temperature | 48°F | ||
| Average outside temperature | 45°F | ||
| Maximum outside temperature | 49°F | ||
| Minimum outside temperature | 41°F | ||
| Precipitation | 3.8in | ||
| Number of days of precipitation | 6 jour(s) (20%) | ||
| Cloud cover | 55% | ||
| Our opinion | freezing swimming |
Holyhead
| March | |||
| Average sea temperature | 47°F | ||
| Minimum sea temperature | 46°F | ||
| Maximum sea temperature | 49°F | ||
| Average outside temperature | 47°F | ||
| Maximum outside temperature | 49°F | ||
| Minimum outside temperature | 45°F | ||
| Precipitation | 4in | ||
| Number of days of precipitation | 7 jour(s) (22%) | ||
| Cloud cover | 53% | ||
| Our opinion | freezing swimming |
Pembrokeshire
| March | |||
| Average sea temperature | 47°F | ||
| Minimum sea temperature | 46°F | ||
| Maximum sea temperature | 49°F | ||
| Average outside temperature | 49°F | ||
| Maximum outside temperature | 50°F | ||
| Minimum outside temperature | 45°F | ||
| Precipitation | 3.7in | ||
| Number of days of precipitation | 8 jour(s) (24%) | ||
| Cloud cover | 52% | ||
| Our opinion | freezing swimming |
More information on swimming in Pembrokeshire in march
Snowdonia National Park
| March | |||
| Average sea temperature | 47°F | ||
| Minimum sea temperature | 45°F | ||
| Maximum sea temperature | 48°F | ||
| Average outside temperature | 40°F | ||
| Maximum outside temperature | 43°F | ||
| Minimum outside temperature | 36°F | ||
| Precipitation | 4.8in | ||
| Number of days of precipitation | 7 jour(s) (21%) | ||
| Cloud cover | 60% | ||
| Our opinion | freezing swimming |
List of coastal cities in Wales
| Cardiff in march | freezing swimming |
| Conwy in march | freezing swimming |
| Holyhead in march | freezing swimming |
| Pembrokeshire in march | freezing swimming |
| Snowdonia National Park in march | freezing swimming |
| Swansea in march | freezing swimming |
| Aberystwyth in march | freezing swimming |
| Amlwch in march | freezing swimming |
| Barmouth in march | freezing swimming |
| Barry in march | freezing swimming |
| Buckley in march | freezing swimming |
| Fishguard in march | freezing swimming |
| Llandudno in march | freezing swimming |
| Llanelli in march | freezing swimming |
| Porthcawl in march | freezing swimming |