Belfast weather in March 2026

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 daytime maximum temperatures of 9°C in Belfast, Northern Ireland in March based on long-term weather averages. There are 3 hours of sunshine per day on average with 19 days with some rainfall and typically 78 mm of rainfall in the month.

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)