Swimming in Wales in july 2025 Sea temperature by city in july
Do you want to go to the beach in Wales in july 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 july in Wales by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Wales in july 2025
Here, find the average sea temperature in Wales in july in several coastal cities.
61°F
min: 58°F / max: 63°F
Conwy
60°F
min: 57°F / max: 63°F
Holyhead
58°F
min: 56°F / max: 60°F
60°F
min: 58°F / max: 63°F
Snowdonia National Park
59°F
min: 56°F / max: 62°F
61°F
min: 58°F / max: 64°F
Aberystwyth
59°F
min: 57°F / max: 62°F
Amlwch
59°F
min: 57°F / max: 62°F
59°F
min: 56°F / max: 61°F
Barry
61°F
min: 58°F / max: 63°F
Buckley
61°F
min: 58°F / max: 64°F
Fishguard
60°F
min: 57°F / max: 63°F
60°F
min: 57°F / max: 63°F
Llanelli
61°F
min: 58°F / max: 64°F
Porthcawl
61°F
min: 58°F / max: 65°F
Where should you go swimming in Wales in the month of july?
Swimming in Wales in july is cold (in the best case scenario)
In july in Wales swimming conditions vary by city. Details below:
Swimming in july in Cardiff, Conwy, Pembrokeshire, Swansea, Barry, Buckley, Fishguard, Llandudno, Llanelli and Porthcawl is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average temperature of 61°F (min: 58°F/max: 63°F).
Forget about swimming in Holyhead, Snowdonia National Park, Aberystwyth, Amlwch and Barmouth in july! The water temperature is freezing, reaching as low as 56°F (and only 60°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 july: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in july
Cardiff
| July | |||
| Average sea temperature | 61°F | ||
| Minimum sea temperature | 58°F | ||
| Maximum sea temperature | 63°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 68°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 2.4in | ||
| Number of days of precipitation | 3 jour(s) (11%) | ||
| Cloud cover | 48% | ||
| Our opinion | cold swimming |
More information on swimming in Cardiff in july
Conwy
| July | |||
| Average sea temperature | 60°F | ||
| Minimum sea temperature | 57°F | ||
| Maximum sea temperature | 63°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 58°F | ||
| Precipitation | 4.5in | ||
| Number of days of precipitation | 7 jour(s) (23%) | ||
| Cloud cover | 52% | ||
| Our opinion | cold swimming |
Holyhead
| July | |||
| Average sea temperature | 58°F | ||
| Minimum sea temperature | 56°F | ||
| Maximum sea temperature | 60°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 63°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 5in | ||
| Number of days of precipitation | 8 jour(s) (27%) | ||
| Cloud cover | 50% | ||
| Our opinion | freezing swimming |
Pembrokeshire
| July | |||
| Average sea temperature | 60°F | ||
| Minimum sea temperature | 58°F | ||
| Maximum sea temperature | 63°F | ||
| Average outside temperature | 63°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 61°F | ||
| Precipitation | 4.4in | ||
| Number of days of precipitation | 7 jour(s) (22%) | ||
| Cloud cover | 47% | ||
| Our opinion | cold swimming |
More information on swimming in Pembrokeshire in july
Snowdonia National Park
| July | |||
| Average sea temperature | 59°F | ||
| Minimum sea temperature | 56°F | ||
| Maximum sea temperature | 62°F | ||
| Average outside temperature | 58°F | ||
| Maximum outside temperature | 61°F | ||
| Minimum outside temperature | 54°F | ||
| Precipitation | 5.9in | ||
| Number of days of precipitation | 9 jour(s) (28%) | ||
| Cloud cover | 58% | ||
| Our opinion | freezing swimming |
List of coastal cities in Wales
| Cardiff in july | cold swimming |
| Conwy in july | cold swimming |
| Holyhead in july | freezing swimming |
| Pembrokeshire in july | cold swimming |
| Snowdonia National Park in july | freezing swimming |
| Swansea in july | cold swimming |
| Aberystwyth in july | freezing swimming |
| Amlwch in july | freezing swimming |
| Barmouth in july | freezing swimming |
| Barry in july | cold swimming |
| Buckley in july | cold swimming |
| Fishguard in july | cold swimming |
| Llandudno in july | cold swimming |
| Llanelli in july | cold swimming |
| Porthcawl in july | cold swimming |