Ballycastle weather in May 2025

Q: How warm is it in Ballycastle in May?

Daytime temperatures usually reach 13°C in Ballycastle in May, falling to 6°C at night.

Q: How sunny is it in Ballycastle in May?

There are normally 6 hours of bright sunshine each day in Ballycastle in May - that's 36% of daylight hours.

Q: Is the sea cold around Ballycastle in May?

The average sea temperature around Ballycastle in May is 9°C.

Q: Does it rain in Ballycastle in May?

There are usually 17 days with some rain in Ballycastle in May and the average monthly rainfall is 64mm.

Expect 55°F daytime maximum temperatures in the shade with on average 6 hours of sunshine per day in Ballycastle in May. Check more long-term weather averages for Ballycastle in May before you book your next holiday to Northern Ireland in 2025/2026.

55
55°F max day temperature
6
6 hours of sunshine per day
17
17 days with some rainfall
43
43°F min night temperature
16
16 hours of daylight per day
0
No heat & humidity
2.5
2.5 inches of monthly rainfall
5
5 (Moderate) UV index
48
48°F sea temperature

More about Ballycastle

Ballycastle by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for Northern Ireland

National Trust Holidays: up to 35% off 10+ night stays

Discount Code

Save up to 35% on 10+ night stays with National Trust Holidays
Discover breaks to Cornwall, Devon , Wales & Nothern Ireland
Stay between 1 Oct & 30 Nov or 1 Jan & 28 Feb 2025

Show discount code

******NAF

Redeem National Trust Holidays discount code >>

Expires at 23:59 on Friday 28th Feb 2025 · View all National Trust Holidays offers

The May weather guide for Northern Ireland (Ballycastle) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C) | Imperial (°F)