Belfast weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Poor
Best time to visit: June – August
What is the weather like in Belfast in October?
In October, Belfast is cool: daytime highs average 13 °C, and nights cool down to about 10 °C. The sea averages 13.6 °C – swimming is only for the hardy. The sun is scarce, with only about 3 hours a day. It rains often – on about 15 days, adding up to 104 mm. All in all, October is not an ideal month for a holiday in Belfast.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 50 | 31 | 16 |
| Day | 16° | 13° | 10° |
| Night | 12° | 10° | 7° |
| Sea | 14° | 14° | 12° |
| Sun | 4 h | 3 h | 2 h |
| Rain days | 14 | 15 | 15 |
More details for October
- Daylight
- 10 h 38 min07:50 – 18:28
- UV index
- 1 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 28 km/haverage daily peakAll months
- Cloud cover
- 74 %on averageAll months
- Hot days
- 0 days30 °C or more
- Snow days
- 0 days1 cm or more of fresh snow
- Time zone
- UTC+1Europe/London
How the score comes together
- Temperatureweight 50 %50 %
- Sunshineweight 20 %0 %
- Few rainy daysweight 30 %20 %
Each factor is rated from 0 to 100 % and weighted for the travel style “City break”.
What to pack in October
- A jumper for the evenings
- Rain jacket or umbrella
Belfast in October: quick answers
Is Belfast hot in October?
No. In October, Belfast is cool: daytime highs average 13 °C and nights drop to about 10 °C.
Can you swim in Belfast in October?
Only if you don't mind cold water: in October the sea averages just 13.6 °C. Comfortable swimming temperatures are not reached at any time of year.
Does it rain much in Belfast in October?
It rains often – on about 15 days, adding up to 104 mm.
Belfast month by month
The whole year in BelfastAll destinations: United KingdomWhere to go in OctoberSea temperature in October
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