Antrim weather in August 2026

Q: How hot is it in Antrim in August?

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

Q: How sunny is it in Antrim in August?

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

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

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

Q: Does it rain in Antrim in August?

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

Expect daytime maximum temperatures of 18°C in Antrim, Northern Ireland in August based on long-term weather averages. There are 5 hours of sunshine per day on average with 19 days with some rainfall and typically 85 mm of rainfall in the month.

18
18°C max day temperature
5
5 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
85
85 mm of monthly rainfall
5
5 (Moderate) UV index

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The August weather guide for Northern Ireland (Antrim) 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)