Belfast weather in March
Temperature, sea and sunshine in March: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in March
Poor
Best time to visit: June – August
What is the weather like in Belfast in March?
In March, Belfast is cold: daytime highs average 9 °C, and nights cool down to about 5 °C. The sea averages 8.0 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain is frequent, with about 13 rainy days and 66 mm in total. All in all, March is not an ideal month for a holiday in Belfast.
March compared
How the weather changes from February to April. Tap a month to open it.
| FebruaryFeb | MarchMar | AprilApr | |
|---|---|---|---|
| Score | 10 | 16 | 31 |
| Day | 8° | 9° | 10° |
| Night | 5° | 5° | 6° |
| Sea | 8° | 8° | 8° |
| Sun | 3 h | 4 h | 5 h |
| Rain days | 13 | 13 | 13 |
More details for March
- Daylight
- 11 h 44 min06:41 – 18:25
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 26 km/haverage daily peakAll months
- Cloud cover
- 72 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+0Europe/London
How the score comes together
- Temperatureweight 50 %8 %
- Sunshineweight 20 %8 %
- Few rainy daysweight 30 %34 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in March
- Warm jacket
- Rain jacket or umbrella
Belfast in March: quick answers
Is Belfast hot in March?
No. In March, Belfast is cold: daytime highs average 9 °C and nights drop to about 5 °C.
Can you swim in Belfast in March?
Only if you don't mind cold water: in March the sea averages just 8.0 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Belfast in March?
Rain is frequent, with about 13 rainy days and 66 mm in total.
Belfast month by month
The whole year in BelfastAll destinations: United KingdomWhere to go in MarchSea temperature in March
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences