Swimming in Northern Ireland in january 2025 Sea temperature by city in january

Do you want to go to the beach in Northern Ireland in january 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 january in Northern Ireland by city and our opinion on the chances of enjoying pleasant sea conditions.

Sea temperature in Northern Ireland in january 2025

Here, find the average sea temperature in Northern Ireland in january in several coastal cities.

County Antrim in january

on average:

48°F

min: 46°F / max: 51°F

Ballycastle (Causeway Coast)

on average:

49°F

min: 47°F / max: 50°F

Larne

on average:

48°F

min: 46°F / max: 50°F

Carrickfergus

on average:

49°F

min: 46°F / max: 51°F

Glenariff

on average:

49°F

min: 46°F / max: 51°F

Newtownabbey

on average:

48°F

min: 46°F / max: 50°F

County Londonderry in january

on average:

50°F

min: 48°F / max: 52°F

Castlerock

on average:

49°F

min: 47°F / max: 51°F

Limavady

on average:

49°F

min: 48°F / max: 51°F

on average:

49°F

min: 47°F / max: 51°F

County Down in january

Donwpatrick

on average:

49°F

min: 47°F / max: 51°F

Annalong

on average:

49°F

min: 46°F / max: 51°F

Ballywalter

on average:

48°F

min: 46°F / max: 51°F

Bangor

on average:

49°F

min: 46°F / max: 51°F

Donaghadee

on average:

49°F

min: 46°F / max: 51°F

Dundrum

on average:

49°F

min: 47°F / max: 52°F

Where should you go swimming in Northern Ireland in the month of january?

Swimming in Northern Ireland in january is freezing

In january 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 january! The water temperature is freezing, reaching as low as 46°F (and only 51°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 january: the map of sea temperatures

ideal swimming pleasant swimming cool swimming cold swimming freezing swimming

Water temperature and seasonal norms in january

Belfast

January
Average sea temperature 48°F
Minimum sea temperature 46°F
Maximum sea temperature 51°F
Average outside temperature 43°F
Maximum outside temperature 45°F
Minimum outside temperature 40°F
Precipitation 4.3in
Number of days of precipitation 7 jour(s)
(24%)
Cloud cover 63%
Our opinion freezing swimming

More information on swimming in Belfast in january

Ballycastle (Causeway Coast)

January
Average sea temperature 49°F
Minimum sea temperature 47°F
Maximum sea temperature 50°F
Average outside temperature 43°F
Maximum outside temperature 47°F
Minimum outside temperature 41°F
Precipitation 5.5in
Number of days of precipitation 10 jour(s)
(31%)
Cloud cover 64%
Our opinion freezing swimming

Derry (Londonderry)

January
Average sea temperature 50°F
Minimum sea temperature 48°F
Maximum sea temperature 52°F
Average outside temperature 41°F
Maximum outside temperature 45°F
Minimum outside temperature 38°F
Precipitation 2.4in
Number of days of precipitation 3 jour(s)
(10%)
Cloud cover 68%
Our opinion freezing swimming

More information on swimming in Derry (Londonderry) in january

Donwpatrick

January
Average sea temperature 49°F
Minimum sea temperature 47°F
Maximum sea temperature 51°F
Average outside temperature 45°F
Maximum outside temperature 47°F
Minimum outside temperature 43°F
Precipitation 3.3in
Number of days of precipitation 5 jour(s)
(18%)
Cloud cover 59%
Our opinion freezing swimming

Larne

January
Average sea temperature 48°F
Minimum sea temperature 46°F
Maximum sea temperature 50°F
Average outside temperature 45°F
Maximum outside temperature 47°F
Minimum outside temperature 41°F
Precipitation 4.4in
Number of days of precipitation 7 jour(s)
(24%)
Cloud cover 62%
Our opinion freezing swimming

List of coastal cities in Northern Ireland

Belfast in januaryfreezing swimming
Ballycastle (Causeway Coast) in januaryfreezing swimming
Derry (Londonderry) in januaryfreezing swimming
Donwpatrick in januaryfreezing swimming
Larne in januaryfreezing swimming
Annalong in januaryfreezing swimming
Ballywalter in januaryfreezing swimming
Bangor in januaryfreezing swimming
Carrickfergus in januaryfreezing swimming
Castlerock in januaryfreezing swimming
Donaghadee in januaryfreezing swimming
Dundrum in januaryfreezing swimming
Glenariff in januaryfreezing swimming
Holywood in januaryfreezing swimming
Kilkeel in januaryfreezing swimming
Limavady in januaryfreezing swimming
Millisle in januaryfreezing swimming
Newcastle in januaryfreezing swimming
Newtownabbey in januaryfreezing swimming
Newtownards in januaryfreezing swimming
Portrush in januaryfreezing swimming
Portstewart in januaryfreezing swimming
Warrenpoint in januaryfreezing swimming
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