Belfast weather live forecast

Today's maximum temperature in Belfast is expected to be 15°C. Select a day from the live weather forecast for Belfast, Northern Ireland, UK for more weather parameters.

Thursday
17th Sep
15

12

4

2
Friday
18th Sep
16

12

1

1
Saturday
19th Sep
17

12

4

2
Sunday
20th Sep
16

11

2

2
Monday
21st Sep
21

15

3

2

5-day weather forecast updated at 04:00 on Thursday 17th September 2026 GMT

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The 5-day weather forecast for Northern Ireland (Belfast) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Belfast weather forecast by day

Below are the detailed weather forecasts for Belfast for the next 5 days.

Belfast weather for Thursday 17th September 2026

Expect broken clouds in Belfast, Northern Ireland with a maximum temperature of 15°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the west.

15
°C maximum temperature
12
°C minimum temperature
broken clouds
4
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
25
kph wind from W

Belfast weather for Friday 18th September 2026

Expect mostly cloudy with light rain in Belfast, Northern Ireland with a maximum temperature of 16°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 92% chance of some rain and a moderate breeze of 23 kph from the south-west.

16
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
1
UV index (Low)
92
% chance of some rain
<5
mm of rainfall expected
16
°C wind chill
23
kph wind from SW

Belfast weather for Saturday 19th September 2026

Expect broken clouds in Belfast, Northern Ireland with a maximum temperature of 17°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the west.

17
°C maximum temperature
12
°C minimum temperature
broken clouds
4
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
17
°C wind chill
24
kph wind from W

Belfast weather for Sunday 20th September 2026

Expect mostly cloudy with light rain in Belfast, Northern Ireland with a maximum temperature of 16°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 25% chance of some rain and a gentle breeze of 17 kph from the west.

16
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
2
UV index (Low)
25
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
17
kph wind from W

Belfast weather for Monday 21st September 2026

Expect broken clouds in Belfast, Northern Ireland with a maximum temperature of 21°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the south-west.