The temperatures in Belfast in August are usually low and can range between 11°C and 17°C.
You can expect rain for roughly half of the month of August in Belfast. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
Our weather forecast can give you a great sense of what weather to expect in Belfast in August 2025.
If you’re planning to visit Belfast in the near future, we highly recommend that you review the 14 day weather forecast for Belfast before you arrive.
Temperatures
17° / 11°
Rainy Days
10
Snowy Days
0
Dry Days
21
Rainfall
149
mm
Sun Hours
7.3
Hrs
