Belfast in Summer — Weather & What to Expect
Summer in Belfast (June, July, August) averages daytime highs of 18.2°C and lows of 11.6°C, with around 298.1mm of rain across the season (49 rainy days in total). It includes some of the best months of the year to visit (June, July, August).
In the northern hemisphere, summer in Belfast covers June, July, August.
Summer in Belfast month by month
| Month | High | Low | Rain | Rainy days | Rating |
|---|---|---|---|---|---|
| June | 17.8°C | 10.9°C | 95.2mm | 15 | 10/10 |
| July | 18.4°C | 11.8°C | 97.7mm | 17 | 10/10 |
| August | 18.4°C | 12.1°C | 105.2mm | 17 | 9/10 |
What to pack for Belfast in summer
- Warm layers
- Light jacket or fleece
- Comfortable walking shoes
- Light waterproof layer
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Frequently Asked Questions
Is summer a good time to visit Belfast?
Summer in Belfast rates around 10/10 — excellent time to visit. Average highs are 18.2°C with 298.1mm of rain across the season.
How hot is Belfast in summer?
Daytime highs average 18.2°C (64.8°F) across June, July, August, with nights around 11.6°C.
What months are summer in Belfast?
Belfast is in the northern hemisphere, so summer covers June, July, August.
See also: best time to visit Belfast · Belfast annual climate · Belfast in spring · Belfast in autumn · Belfast in winter
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Once you know what summer in Belfast looks like, find out exactly what to pack for Belfast at 247PackingList. For currency, language and country facts, see the United Kingdom guide at 247CountryInfo.
Summer in Belfast — what to pack
Travel clothing layers
Pack layers — temperatures can vary significantly between day and night.
Check Price →Check clothing sizes in United Kingdom at 247Sizing before you shop.
More summer travel essentials
Last updated:
Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.