Swimming in Northern Ireland in december 2024 Sea temperature by city in december
Do you want to go to the beach in Northern Ireland in december 2024? 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 december in Northern Ireland by city and our opinion on the chances of enjoying pleasant sea conditions.
Sea temperature in Northern Ireland in december 2024
Here, find the average sea temperature in Northern Ireland in december in several coastal cities.
County Antrim
51°F
min: 49°F / max: 54°F
Ballycastle (Causeway Coast)
51°F
min: 49°F / max: 53°F
Larne
51°F
min: 49°F / max: 54°F
Carrickfergus
52°F
min: 49°F / max: 54°F
Glenariff
51°F
min: 49°F / max: 53°F
Newtownabbey
52°F
min: 49°F / max: 54°F
County Londonderry
52°F
min: 50°F / max: 54°F
Castlerock
51°F
min: 49°F / max: 54°F
Limavady
51°F
min: 50°F / max: 54°F
51°F
min: 50°F / max: 54°F
County Down
Donwpatrick
52°F
min: 50°F / max: 55°F
Annalong
52°F
min: 50°F / max: 55°F
Ballywalter
51°F
min: 49°F / max: 54°F
Bangor
52°F
min: 49°F / max: 54°F
Donaghadee
52°F
min: 49°F / max: 54°F
Dundrum
52°F
min: 49°F / max: 55°F
Where should you go swimming in Northern Ireland in the month of december?
Swimming in Northern Ireland in december is freezing
In december in Northern Ireland swimming conditions are generally the same everywhere.
Forget about swimming in Belfast, Ballycastle (Causeway Coast), Derry (Londonderry), Donwpatrick, Larne, Annalong, Ballywalter, Bangor, Carrickfergus, Castlerock, Donaghadee, Dundrum, Glenariff, Holywood, Kilkeel, Limavady, Millisle, Newcastle, Newtownabbey, Newtownards, Portrush, Portstewart and Warrenpoint in december! The water temperature is freezing, reaching as low as 49°F (and only 54°F at the best of times). Our advice: plan on sightseeing, and don't bring your beach towel!
Where to go swimming in Northern Ireland in december: the map of sea temperatures
ideal swimming 
pleasant swimming 
cool swimming 
cold swimming 
freezing swimmingWater temperature and seasonal norms in december
Belfast
| December | |||
| Average sea temperature | 51°F | ||
| Minimum sea temperature | 49°F | ||
| Maximum sea temperature | 54°F | ||
| Average outside temperature | 45°F | ||
| Maximum outside temperature | 47°F | ||
| Minimum outside temperature | 41°F | ||
| Precipitation | 4.3in | ||
| Number of days of precipitation | 7 jour(s) (21%) | ||
| Cloud cover | 59% | ||
| Our opinion | freezing swimming |
More information on swimming in Belfast in december
Ballycastle (Causeway Coast)
| December | |||
| Average sea temperature | 51°F | ||
| Minimum sea temperature | 49°F | ||
| Maximum sea temperature | 53°F | ||
| Average outside temperature | 45°F | ||
| Maximum outside temperature | 47°F | ||
| Minimum outside temperature | 43°F | ||
| Precipitation | 5.6in | ||
| Number of days of precipitation | 10 jour(s) (34%) | ||
| Cloud cover | 62% | ||
| Our opinion | freezing swimming |
Derry (Londonderry)
| December | |||
| Average sea temperature | 52°F | ||
| Minimum sea temperature | 50°F | ||
| Maximum sea temperature | 54°F | ||
| Average outside temperature | 43°F | ||
| Maximum outside temperature | 45°F | ||
| Minimum outside temperature | 40°F | ||
| Precipitation | 2.2in | ||
| Number of days of precipitation | 3 jour(s) (9%) | ||
| Cloud cover | 66% | ||
| Our opinion | freezing swimming |
More information on swimming in Derry (Londonderry) in december
Donwpatrick
| December | |||
| Average sea temperature | 52°F | ||
| Minimum sea temperature | 50°F | ||
| Maximum sea temperature | 55°F | ||
| Average outside temperature | 47°F | ||
| Maximum outside temperature | 49°F | ||
| Minimum outside temperature | 45°F | ||
| Precipitation | 3.1in | ||
| Number of days of precipitation | 5 jour(s) (17%) | ||
| Cloud cover | 56% | ||
| Our opinion | freezing swimming |
Larne
| December | |||
| Average sea temperature | 51°F | ||
| Minimum sea temperature | 49°F | ||
| Maximum sea temperature | 54°F | ||
| Average outside temperature | 45°F | ||
| Maximum outside temperature | 49°F | ||
| Minimum outside temperature | 43°F | ||
| Precipitation | 4.5in | ||
| Number of days of precipitation | 8 jour(s) (26%) | ||
| Cloud cover | 59% | ||
| Our opinion | freezing swimming |
List of coastal cities in Northern Ireland
| Belfast in december | freezing swimming |
| Ballycastle (Causeway Coast) in december | freezing swimming |
| Derry (Londonderry) in december | freezing swimming |
| Donwpatrick in december | freezing swimming |
| Larne in december | freezing swimming |
| Annalong in december | freezing swimming |
| Ballywalter in december | freezing swimming |
| Bangor in december | freezing swimming |
| Carrickfergus in december | freezing swimming |
| Castlerock in december | freezing swimming |
| Donaghadee in december | freezing swimming |
| Dundrum in december | freezing swimming |
| Glenariff in december | freezing swimming |
| Holywood in december | freezing swimming |
| Kilkeel in december | freezing swimming |
| Limavady in december | freezing swimming |
| Millisle in december | freezing swimming |
| Newcastle in december | freezing swimming |
| Newtownabbey in december | freezing swimming |
| Newtownards in december | freezing swimming |
| Portrush in december | freezing swimming |
| Portstewart in december | freezing swimming |
| Warrenpoint in december | freezing swimming |