Swimming in Ireland in august 2025 Sea temperature by city in august
Do you want to go to the beach in Ireland in august 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 august in Ireland by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Ireland in august 2025
Here, find the average sea temperature in Ireland in august in several coastal cities.
Leinster in august
59°F
min: 58°F / max: 61°F
59°F
min: 58°F / max: 60°F
Dalkey Island
59°F
min: 58°F / max: 61°F
Rosslare
60°F
min: 59°F / max: 62°F
60°F
min: 59°F / max: 62°F
Arklow
60°F
min: 58°F / max: 62°F
Munster in august
62°F
min: 60°F / max: 65°F
61°F
min: 58°F / max: 63°F
Ardmore
62°F
min: 59°F / max: 64°F
Castletownbere
62°F
min: 59°F / max: 65°F
61°F
min: 58°F / max: 63°F
Kilkee
61°F
min: 59°F / max: 63°F
Connacht in august
60°F
min: 58°F / max: 63°F
60°F
min: 58°F / max: 62°F
60°F
min: 58°F / max: 62°F
60°F
min: 58°F / max: 62°F
Aran Islands
60°F
min: 58°F / max: 63°F
Ballycastle
59°F
min: 57°F / max: 61°F
North East Ireland (Ulster) in august
59°F
min: 57°F / max: 61°F
59°F
min: 57°F / max: 61°F
59°F
min: 57°F / max: 61°F
Bundoran
59°F
min: 57°F / max: 61°F
Derrybeg
59°F
min: 57°F / max: 61°F
59°F
min: 57°F / max: 61°F
Where should you go swimming in Ireland in the month of august?
Swimming in Ireland in august is cold (in the best case scenario)
In august in Ireland swimming conditions vary by city. Details below:
Swimming in august in Dublin, Cork, Galway, Belmullet, Connemara National Park, Dingle, Achill Island, Aran Islands, Ardmore, Castletownbere, Dalkey Island, Cliffs of Moher, Kilkee, Rosslare, Shannon, Skellig Islands, Tramore, Valentia, Waterford, Wexford, Arklow, Clonakilty, Cobh, Crosshaven, Dungarvan, Greystones, Kenmare, Killorglin, Kinsale, Sligo, Tralee, Westport, Wicklow and Youghal is possible... with a wetsuit! Indeed, the water is cold at this time of year with an average temperature of 59°F (min: 58°F/max: 61°F).
Forget about swimming in Dundalk, Dungloe, Killybegs, Letterkenny, Ballycastle, Bundoran, Derrybeg, Donegal, Dunfanaghy, Gleann Cholm Cille, Malin Head, Streedagh Point, Balbriggan, Ballina, Ballyshannon, Bray, Buncrana, Dún Laoghaire, Laytown, Malahide, Moville and Skerries in august! The water temperature is freezing, reaching as low as 58°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 Ireland in august: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in august
Dublin
| August | |||
| Average sea temperature | 59°F | ||
| Minimum sea temperature | 58°F | ||
| Maximum sea temperature | 61°F | ||
| Average outside temperature | 59°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 56°F | ||
| Precipitation | 3.3in | ||
| Number of days of precipitation | 5 jour(s) (15%) | ||
| Cloud cover | 53% | ||
| Our opinion | cold swimming |
More information on swimming in Dublin in august
Cork
| August | |||
| Average sea temperature | 62°F | ||
| Minimum sea temperature | 60°F | ||
| Maximum sea temperature | 65°F | ||
| Average outside temperature | 61°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 56°F | ||
| Precipitation | 4.9in | ||
| Number of days of precipitation | 7 jour(s) (23%) | ||
| Cloud cover | 53% | ||
| Our opinion | cold swimming |
More information on swimming in Cork in august
Galway
| August | |||
| Average sea temperature | 60°F | ||
| Minimum sea temperature | 58°F | ||
| Maximum sea temperature | 63°F | ||
| Average outside temperature | 59°F | ||
| Maximum outside temperature | 65°F | ||
| Minimum outside temperature | 56°F | ||
| Precipitation | 5.2in | ||
| Number of days of precipitation | 8 jour(s) (27%) | ||
| Cloud cover | 64% | ||
| Our opinion | cold swimming |
More information on swimming in Galway in august
Belmullet
| August | |||
| Average sea temperature | 60°F | ||
| Minimum sea temperature | 58°F | ||
| Maximum sea temperature | 62°F | ||
| Average outside temperature | 59°F | ||
| Maximum outside temperature | 61°F | ||
| Minimum outside temperature | 59°F | ||
| Precipitation | 7.4in | ||
| Number of days of precipitation | 12 jour(s) (40%) | ||
| Cloud cover | 62% | ||
| Our opinion | cold swimming |
More information on swimming in Belmullet in august
Connemara National Park
| August | |||
| Average sea temperature | 60°F | ||
| Minimum sea temperature | 58°F | ||
| Maximum sea temperature | 62°F | ||
| Average outside temperature | 58°F | ||
| Maximum outside temperature | 61°F | ||
| Minimum outside temperature | 54°F | ||
| Precipitation | 4.8in | ||
| Number of days of precipitation | 7 jour(s) (24%) | ||
| Cloud cover | 65% | ||
| Our opinion | cold swimming |
More information on swimming in Connemara National Park in august
List of coastal cities in Ireland
| Dublin in august | cold swimming |
| Cork in august | cold swimming |
| Galway in august | cold swimming |
| Belmullet in august | cold swimming |
| Connemara National Park in august | cold swimming |
| Dingle in august | cold swimming |
| Dundalk in august | freezing swimming |
| Dungloe in august | freezing swimming |
| Killybegs in august | freezing swimming |
| Letterkenny in august | freezing swimming |
| Achill Island in august | cold swimming |
| Aran Islands in august | cold swimming |
| Ardmore in august | cold swimming |
| Ballycastle in august | freezing swimming |
| Bundoran in august | freezing swimming |
| Castletownbere in august | cold swimming |
| Dalkey Island in august | cold swimming |
| Derrybeg in august | freezing swimming |
| Donegal in august | freezing swimming |
| Dunfanaghy in august | freezing swimming |
| Cliffs of Moher in august | cold swimming |
| Gleann Cholm Cille in august | freezing swimming |
| Kilkee in august | cold swimming |
| Malin Head in august | freezing swimming |
| Rosslare in august | cold swimming |
| Shannon in august | cold swimming |
| Skellig Islands in august | cold swimming |
| Streedagh Point in august | freezing swimming |
| Tramore in august | cold swimming |
| Valentia in august | cold swimming |
| Waterford in august | cold swimming |
| Wexford in august | cold swimming |
| Arklow in august | cold swimming |
| Balbriggan in august | freezing swimming |
| Ballina in august | freezing swimming |
| Ballyshannon in august | freezing swimming |
| Bray in august | freezing swimming |
| Buncrana in august | freezing swimming |
| Clonakilty in august | cold swimming |
| Cobh in august | cold swimming |
| Crosshaven in august | cold swimming |
| Dún Laoghaire in august | freezing swimming |
| Dungarvan in august | cold swimming |
| Greystones in august | cold swimming |
| Kenmare in august | cold swimming |
| Killorglin in august | cold swimming |
| Kinsale in august | cold swimming |
| Laytown in august | freezing swimming |
| Malahide in august | freezing swimming |
| Moville in august | freezing swimming |
| Skerries in august | freezing swimming |
| Sligo in august | cold swimming |
| Tralee in august | cold swimming |
| Westport in august | cold swimming |
| Wicklow in august | cold swimming |
| Youghal in august | cold swimming |