Portstewart weather in July 2025

Expect 17°C daytime maximum temperatures in the shade with on average 4 hours of sunshine per day in Portstewart in July. Check more long-term weather averages for Portstewart in July before you book your next holiday to Northern Ireland in 2025/2026.

  • 17°C maximum daytime temperature in July in Portstewart17
    17°C max day temperature
  • 4 hours of sunshine per day
  • 18 days with some rainfall in July in Portstewart18
    18 days with some rainfall
  • 10°C minimum night-time temperature in July in Portstewart10
    10°C min night temperature
  • 17 hours of daylight per day in July in Portstewart17
    17 hours of daylight per day
  • No heat & humidity in July in Portstewart0
    No heat & humidity
  • 77 mm monthly rainfall in July in Portstewart77
    77 mm of monthly rainfall
  • UV (maximum) index 6 (High) in July in Portstewart6
    6 (High) UV index
  • 13°C sea temperature in July in Portstewart13
    13°C sea temperature

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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 / mm)  |  Imperial (°F / inches)

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More about the UK

How warm is it in Portstewart in July?

Daytime temperatures usually reach 17°C in Portstewart in July, falling to 10°C at night.

How sunny is it in Portstewart in July?

There are normally 4 hours of bright sunshine each day in Portstewart in July - that's 25% of daylight hours.

How warm is the sea around Portstewart in July?

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

Does it rain in Portstewart in July?

There are usually 18 days with some rain in Portstewart in July and the average monthly rainfall is 77mm.

Portstewart July sunrise & sunset times

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

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Tuesday, 1st July 2025 03:51 21:10
Wednesday, 16th July 2025 04:09 20:56
Thursday, 31st July 2025 04:33 20:32

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