Weather in Belfast in August
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Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youAugust in Belfast is pleasantly mild, with average highs of 18.4°C and lows of 12.1°C. It is fairly wet (17 rainy days on average), with roughly 9.6 hours of sunshine a day. This is peak season for good reason — conditions are close to ideal. For the complete picture, see the best time to visit Belfast — every month compared. Once you know when to go, find your Belfast packing list at 247PackingList.
Get ready for Belfast in August
Search flights to Belfast
Compare 100+ airlines for August — one search, best price.
Search Flights →Travel clothing layers
Pack layers — temperatures can vary significantly between day and night.
Check Price →What to pack for Belfast in August
- Warm layers
- Light jacket or fleece
- Comfortable walking shoes
- Compact travel umbrella
- Waterproof jacket
- Quick-dry clothing
Compare all months in Belfast
| Month | High | Rain | Rating |
|---|---|---|---|
| January | 7.4°C | 62.0mm | 10/10 |
| February | 8.3°C | 104.7mm | 9/10 |
| March | 9.7°C | 69.1mm | 10/10 |
| April | 11.4°C | 49.2mm | 10/10 |
| May | 14.4°C | 75.5mm | 10/10 |
| June | 17.8°C | 95.2mm | 10/10 |
| July | 18.4°C | 97.7mm | 10/10 |
| August | 18.4°C | 105.2mm | 9/10 |
| September | 16.9°C | 110.3mm | 9/10 |
| October | 13.5°C | 130.3mm | 9/10 |
| November | 10.4°C | 80.9mm | 10/10 |
| December | 7.6°C | 107.8mm | 9/10 |
Full month-by-month guide: best time to visit Belfast →
For facts about United Kingdom — currency, language and dialling code — see our United Kingdom country guide at 247CountryInfo. Travellers also find it useful to keep a Belfast travel guide to hand. Check clothing sizes in United Kingdom before you shop.
Frequently Asked Questions
Is August a good time to visit Belfast?
August rates 9/10 for visiting Belfast — excellent time to visit. Expect average highs of 18.4°C, 105.2mm of rain across the month and about 9.6 hours of daily sunshine.
What is the temperature in Belfast in August?
In August, Belfast has average highs of 18.4°C (65.1°F) and average lows of 12.1°C (53.8°F).
Does it rain in Belfast in August?
Some rain is likely. Belfast averages 105.2mm across about 17 rainy days in August, so a light waterproof layer is worth packing.
What should I wear in Belfast in August?
For Belfast in August (18.4°C highs / 12.1°C lows), pack warm layers plus light jacket or fleece, comfortable walking shoes, compact travel umbrella.
More essentials for Belfast in August
Packing cubes
Keep the bag organised whatever the weather — compression cubes for every size.
Check Price →Travel first aid kit
Compact TSA-friendly kit for peace of mind wherever you travel.
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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.