Northen Ireland

Northen Ireland, United Kingdom © By Sam2453

Northen Ireland Sea Temperature

This page provides detailed information about the water temperature in Northen Ireland, United Kingdom. All countries, cities and resorts on the coast. The range of sea temperatures for today. We find every spot where you can swim and tell you what the water temperature is there today and throughout the year.

Water Temperature in Northen Ireland: General Trends and Swimming Opportunities

The sea temperature along the coast of Northern Ireland is influenced by the North Atlantic Ocean, making it relatively cool throughout the year. In the summer months, from June to September, the water temperature typically ranges between 13–16°C (55–61°F), with the warmest conditions usually found in August. Coastal areas such as Bangor, Portrush, and Newcastle experience slightly milder temperatures due to their positioning along the Irish Sea, while the more exposed North Atlantic coast can remain on the lower end of this range. Even in the warmest months, the sea remains quite chilly compared to the southern parts of the UK.

During the winter, from December to March, the sea temperature drops significantly, averaging between 7–10°C (45–50°F). The coldest waters are typically found in February and early March, when temperatures can fall as low as 6°C (43°F). Due to the consistently cool water temperatures, sea swimming in Northern Ireland is often done with wetsuits outside of summer. However, the region's coastal beauty, with its rugged cliffs and scenic beaches, attracts cold-water swimmers year-round, especially those who enjoy the benefits of open-water swimming in colder conditions.

Geographical Location of Northen Ireland

Frequently Asked Questions About Northen Ireland and its Water Temperatures