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

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

Sea temperature in Northern Ireland in june 2025

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

Direct access: County Antrim in june | County Londonderry in june | County Down in june

County Antrim in june

Belfast

on average:

54°F

min: 50°F / max: 58°F

Ballycastle (Causeway Coast)

on average:

54°F

min: 50°F / max: 57°F

Larne

on average:

54°F

min: 50°F / max: 58°F

Carrickfergus

on average:

54°F

min: 50°F / max: 58°F

Glenariff

on average:

53°F

min: 50°F / max: 58°F

Newtownabbey

on average:

54°F

min: 50°F / max: 57°F

County Londonderry in june

Derry (Londonderry)

on average:

54°F

min: 50°F / max: 58°F

Castlerock

on average:

54°F

min: 50°F / max: 57°F

Limavady

on average:

54°F

min: 50°F / max: 58°F

Portstewart

on average:

53°F

min: 50°F / max: 58°F

County Down in june

Donwpatrick

on average:

54°F

min: 51°F / max: 58°F

Annalong

on average:

54°F

min: 51°F / max: 58°F

Ballywalter

on average:

54°F

min: 50°F / max: 57°F

Bangor

on average:

54°F

min: 50°F / max: 57°F

Donaghadee

on average:

54°F

min: 50°F / max: 58°F

Dundrum

on average:

54°F

min: 51°F / max: 58°F

Share on facebook Share on twitter Send on messenger Send by email

Sea temperature in may in Northern Ireland

Sea temperature in july in Northern Ireland

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

Swimming in Northern Ireland in june is freezing

In june 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 june! The water temperature is freezing, reaching as low as 50°F (and only 58°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 june: the map of sea temperatures

ideal swimming

pleasant swimming

cool swimming

cold swimming

freezing swimming

Water temperature and seasonal norms in june

Belfast

	May	June	July
Average sea temperature	51°F	54°F	57°F
Minimum sea temperature	49°F	50°F	54°F
Maximum sea temperature	52°F	58°F	60°F
Average outside temperature	54°F	59°F	61°F
Maximum outside temperature	58°F	63°F	65°F
Minimum outside temperature	49°F	54°F	56°F
Precipitation	3.8in	4.8in	5.1in
Number of days of precipitation	7 jour(s) (21%)	8 jour(s) (25%)	9 jour(s) (30%)
Cloud cover	56%	58%	58%
Our opinion	freezing swimming	freezing swimming	freezing swimming

More information on swimming in Belfast in june

Ballycastle (Causeway Coast)

	May	June	July
Average sea temperature	51°F	54°F	56°F
Minimum sea temperature	49°F	50°F	54°F
Maximum sea temperature	52°F	57°F	59°F
Average outside temperature	52°F	58°F	59°F
Maximum outside temperature	56°F	59°F	61°F
Minimum outside temperature	49°F	54°F	56°F
Precipitation	4.6in	5.6in	6.7in
Number of days of precipitation	8 jour(s) (27%)	10 jour(s) (35%)	12 jour(s) (40%)
Cloud cover	53%	56%	57%
Our opinion	freezing swimming	freezing swimming	freezing swimming

Derry (Londonderry)

	May	June	July
Average sea temperature	52°F	54°F	57°F
Minimum sea temperature	50°F	50°F	55°F
Maximum sea temperature	53°F	58°F	60°F
Average outside temperature	52°F	58°F	59°F
Maximum outside temperature	58°F	63°F	65°F
Minimum outside temperature	47°F	54°F	56°F
Precipitation	2.2in	2.6in	3.1in
Number of days of precipitation	3 jour(s) (9%)	3 jour(s) (11%)	6 jour(s) (18%)
Cloud cover	62%	67%	69%
Our opinion	freezing swimming	freezing swimming	freezing swimming

More information on swimming in Derry (Londonderry) in june

Donwpatrick

	May	June	July
Average sea temperature	51°F	54°F	57°F
Minimum sea temperature	49°F	51°F	55°F
Maximum sea temperature	52°F	58°F	60°F
Average outside temperature	52°F	58°F	59°F
Maximum outside temperature	56°F	59°F	63°F
Minimum outside temperature	50°F	54°F	58°F
Precipitation	2.4in	3.2in	3.3in
Number of days of precipitation	4 jour(s) (12%)	5 jour(s) (18%)	5 jour(s) (17%)
Cloud cover	50%	50%	51%
Our opinion	freezing swimming	freezing swimming	freezing swimming

Larne

	May	June	July
Average sea temperature	51°F	54°F	57°F
Minimum sea temperature	49°F	50°F	54°F
Maximum sea temperature	52°F	58°F	60°F
Average outside temperature	52°F	58°F	59°F
Maximum outside temperature	56°F	61°F	63°F
Minimum outside temperature	49°F	54°F	58°F
Precipitation	3.9in	5in	5.6in
Number of days of precipitation	7 jour(s) (21%)	8 jour(s) (27%)	10 jour(s) (33%)
Cloud cover	53%	55%	56%
Our opinion	freezing swimming	freezing swimming	freezing swimming

List of coastal cities in Northern Ireland

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