Ballycastle weather in August 2025

Q: How warm is it in Ballycastle in August?

Daytime temperatures usually reach 17°C in Ballycastle in August, falling to 10°C at night.

Q: How sunny is it in Ballycastle in August?

There are normally 4 hours of bright sunshine each day in Ballycastle in August - that's 30% of daylight hours.

Q: How warm is the sea around Ballycastle in August?

The average sea temperature around Ballycastle in August is 14°C.

Q: Does it rain in Ballycastle in August?

There are usually 19 days with some rain in Ballycastle in August and the average monthly rainfall is 98mm.

Expect daytime maximum temperatures of 63°F in Ballycastle, Northern Ireland in August based on long-term weather averages. There are 4 hours of sunshine per day on average with 19 days with some rainfall and typically 3.9 inches of rainfall in the month.

63
63°F max day temperature
4
4 hours of sunshine per day
19
19 days with some rainfall
50
50°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
3.9
3.9 inches of monthly rainfall
5
5 (Moderate) UV index
57
57°F sea temperature

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The August 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)

More about the UK

How warm is it in Ballycastle in August?

Daytime temperatures usually reach 63°F in Ballycastle in August, falling to 50°F at night.

How sunny is it in Ballycastle in August?

There are normally 4 hours of bright sunshine each day in Ballycastle in August - that's 30% of daylight hours.

How warm is the sea around Ballycastle in August?

The average sea temperature around Ballycastle in August is 57°F.

Does it rain in Ballycastle in August?

There are usually 19 days with some rain in Ballycastle in August and the average monthly rainfall is 3.9 inches.

Ballycastle August sunrise & sunset times

Browse the sunrise and sunset times for Ballycastle in August 2025. Select a month to view Ballycastle sunrise and sunset times for the next 12 months.

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