Belfast weather in October 2025

Q: How warm is it in Belfast in October?

Daytime temperatures usually reach 13°C in Belfast in October, falling to 7°C at night.

Q: How sunny is it in Belfast in October?

There are normally 3 hours of bright sunshine each day in Belfast in October - that's 28% of daylight hours.

Q: How warm is the sea around Belfast in October?

The average sea temperature around Belfast in October is 13°C.

Q: Does it rain in Belfast in October?

There are usually 19 days with some rain in Belfast in October and the average monthly rainfall is 100mm.

Expect 55°F daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Belfast in October. Check more long-term weather averages for Belfast in October before you book your next holiday to Northern Ireland in 2025/2026.

55
55°F max day temperature
3
3 hours of sunshine per day
19
19 days with some rainfall
45
45°F min night temperature
10
10 hours of daylight per day
0
No heat & humidity
3.9
3.9 inches of monthly rainfall
2
2 (Low) UV index
55
55°F sea temperature

More about Belfast

Belfast by month

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

Recommended for Belfast

National Trust Holidays: Top deals on UK accommodation

Sale

Explore National Trust holiday properties in the UK
Search by destination or filter by accommodation type
Narrow search by facilities, amenities, ratings & more

Go to National Trust Holidays deal >>

View all National Trust Holidays offers

The October weather guide for Northern Ireland (Belfast) 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)