Portrush weather in August 2026

Q: How hot is it in Portrush in August?

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

Q: How sunny is it in Portrush in August?

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

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

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

Q: Does it rain in Portrush in August?

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

Expect daytime maximum temperatures of 63°F in Portrush, 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 3.6 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
3.6
3.6 inches of monthly rainfall
5
5 (Moderate) UV index
57
57°F sea temperature

More about Portrush

Portrush by month

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

Recommended for Northern Ireland

LateRooms.com: Pet-friendly hotel breaks

Sale

Check out pet-friendly hotel deals at LateRooms.com
Check out stays in Belfast, Edinburgh, Norwich & beyond
Filter deals by dates, destination, guests & more

Go to LateRooms.com deal >>

View all LateRooms.com offers

The August weather guide for Northern Ireland (Portrush) 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)