Newcastle weather in August 2025

Q: How hot is it in Newcastle in August?

Daytime temperatures usually reach 18°C in Newcastle in August, falling to 10°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 15°C.

Q: Does it rain in Newcastle in August?

There are usually 16 days with some rain in Newcastle in August and the average monthly rainfall is 109mm.

Expect 18°C daytime maximum temperatures in the shade with on average 5 hours of sunshine per day in Newcastle in August. Check more long-term weather averages for Newcastle in August before you book your next holiday to Northern Ireland in 2025/2026.

18
18°C max day temperature
5
5 hours of sunshine per day
16
16 days with some rainfall
10
10°C min night temperature
15
15 hours of daylight per day
0
No heat & humidity
109
109 mm of monthly rainfall
5
5 (Moderate) UV index
15
15°C sea temperature

More about Newcastle

Newcastle by month

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

Recommended for Northern Ireland

Rural Retreats: Dog friendly holiday properties

Sale

Search for dog friendly cottages in the UK
Book stays in Sussex, Shropshire, Somerset & more
Filter search by selecting holiday preferences

Go to Rural Retreats deal >>

View all Rural Retreats offers

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 / mm) | Imperial (°F / inches)