Portstewart weather in July 2026

Q: How hot is it in Portstewart in July?

Daytime temperatures usually reach 18°C in Portstewart in July, falling to 11°C at night.

Q: How sunny is it in Portstewart in July?

There are normally 5 hours of bright sunshine each day in Portstewart in July - that's 30% of daylight hours.

Q: How warm is the sea around Portstewart in July?

The average sea temperature around Portstewart in July is 13°C.

Q: Does it rain in Portstewart in July?

There are usually 15 days with some rain in Portstewart in July and the average monthly rainfall is 63mm.

Expect daytime maximum temperatures of 63°F in Portstewart, Northern Ireland in July based on long-term weather averages. There are 4 hours of sunshine per day on average with 18 days with some rainfall and typically 3.0 inches of rainfall in the month.

63
63°F max day temperature
4
4 hours of sunshine per day
18
18 days with some rainfall
50
50°F min night temperature
17
17 hours of daylight per day
0
No heat & humidity
3.0
3.0 inches of monthly rainfall
6
6 (High) UV index
55
55°F sea temperature

More about Portstewart

Portstewart by month

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

Recommended for Northern Ireland

Spabreaks.com: Short spa break deals

Sale

Book a 2 or 3 night spa break for couples
Enjoy access to the gym, pool & restaurant
Stays can include afternoon tea & breakfast

Go to Spabreaks.com deal >>

View all Spabreaks.com offers

The July weather guide for Northern Ireland (Portstewart) 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)