Belfast weather in March 2025

Q: How warm is it in Belfast in March?

Daytime temperatures usually reach 9°C in Belfast in March, falling to 2°C at night.

Q: How sunny is it in Belfast in March?

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

Q: Is the sea cold around Belfast in March?

The average sea temperature around Belfast in March is 7°C.

Q: Does it rain in Belfast in March?

There are usually 19 days with some rain in Belfast in March and the average monthly rainfall is 78mm.

Expect 9°C daytime maximum temperatures in the shade with on average 3 hours of sunshine per day in Belfast in March. Check more long-term weather averages for Belfast in March before you book your next holiday to Northern Ireland in 2025/2026.

9
9°C max day temperature
3
3 hours of sunshine per day
19
19 days with some rainfall
2
2°C min night temperature
12
12 hours of daylight per day
0
No heat & humidity
78
78 mm of monthly rainfall
2
2 (Low) UV index
7
7°C sea temperature

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The March 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 / mm) | Imperial (°F / inches)