Newcastle weather in August 2026

Q: How hot is it in Newcastle in August?

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

Q: How sunny is it in Newcastle in August?

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

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

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

Q: Does it rain in Newcastle in August?

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

Expect daytime maximum temperatures of 64°F in Newcastle, Northern Ireland in August based on long-term weather averages. There are 5 hours of sunshine per day on average with 16 days with some rainfall and typically 4.3 inches of rainfall in the month.

64
64°F max day temperature
5
5 hours of sunshine per day
16
16 days with some rainfall
50
50°F min night temperature
15
15 hours of daylight per day
0
No heat & humidity
4.3
4.3 inches of monthly rainfall
5
5 (Moderate) UV index
59
59°F sea temperature

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The August weather guide for Northern Ireland (Newcastle) 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)