Ballycastle weather in August 2026

Q: How hot is it in Ballycastle in August?

Daytime temperatures usually reach 18°C in Ballycastle in August, falling to 11°C at night.

Q: How sunny is it in Ballycastle in August?

There are normally 5 hours of bright sunshine each day in Ballycastle in August - that's 32% of daylight hours.

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

The average sea temperature around Ballycastle in August is 13°C.

Q: Does it rain in Ballycastle in August?

There are usually 17 days with some rain in Ballycastle in August and the average monthly rainfall is 89mm.

Expect daytime maximum temperatures of 17°C 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 98 mm of rainfall in the month.

17
17°C max day temperature
4
4 hours of sunshine per day
19
19 days with some rainfall
10
10°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
98
98 mm of monthly rainfall
5
5 (Moderate) UV index
14
14°C 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 / mm) | Imperial (°F / inches)

More about the UK

How hot is it in Ballycastle in August?

Daytime temperatures usually reach 18°C in Ballycastle in August, falling to 11°C at night.

How sunny is it in Ballycastle in August?

There are normally 5 hours of bright sunshine each day in Ballycastle in August - that's 32% of daylight hours.

How warm is the sea around Ballycastle in August?

The average sea temperature around Ballycastle in August is 13°C.

Does it rain in Ballycastle in August?

There are usually 17 days with some rain in Ballycastle in August and the average monthly rainfall is 89mm.

Ballycastle August sunrise & sunset times

Browse the sunrise and sunset times for Ballycastle in August 2026. Select a month to view Ballycastle sunrise and sunset times for the next 12 months.

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