Northern Ireland weather live forecast

Today's maximum temperature in Northern Ireland is expected to be 18°C. Select a day from the live weather forecast for Northern Ireland (Belfast), UK for more weather parameters.

Thursday
18th Sep
18

12

2

2
Friday
19th Sep
18

12

0

2
Saturday
20th Sep
13

10

0

1
Sunday
21st Sep
13

9

7

2
Monday
22nd Sep
12

7

7

3

5-day weather forecast updated at 04:00 on Thursday 18th September 2025 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.

Top Northern Ireland destinations

Below are temperatures expected today at popular countries, regions and places in Northern Ireland. Select a destination to see the detailed weather forecast for today, tomorrow and the outlook for the next five days.

18
Belfast
16
Londonderry

All Northern Ireland destinations

Northern Ireland weather forecast by day

Below are the detailed weather forecasts for Northern Ireland for the next 5 days. The forecasts shown are for Belfast and may not represent the whole of Northern Ireland. Browse more destinations in Northern Ireland to view more weather forecasts.

Northern Ireland weather for Thursday 18th September 2025

Expect mostly cloudy with light rain in Northern Ireland with a maximum temperature of 18°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 73% chance of some rain and a moderate breeze of 22 kph from the south-west.

18
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
2
UV index (Low)
73
% chance of some rain
<5
mm of rainfall expected
18
°C wind chill
22
kph wind from SW

Northern Ireland weather for Friday 19th September 2025

Expect mostly cloudy with light rain in Northern Ireland with a maximum temperature of 18°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 2-5 mm of rainfall expected with 24% chance of some rain and a gentle breeze of 17 kph from the south-west.

18
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
0
hours of sunshine
2
UV index (Low)
24
% chance of some rain
<5
mm of rainfall expected
18
°C wind chill
17
kph wind from SW

Northern Ireland weather for Saturday 20th September 2025

Expect mostly cloudy with rain in Northern Ireland with a maximum temperature of 13°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 85% chance of some rain and a fresh breeze of 30 kph from the north.

13
°C maximum temperature
10
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
1
UV index (Low)
85
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
30
kph wind from N

Northern Ireland weather for Sunday 21st September 2025

Expect broken clouds in Northern Ireland with a maximum temperature of 13°C, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a fresh breeze of 30 kph from the north.

13
°C maximum temperature
9
°C minimum temperature
broken clouds
7
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
13
°C wind chill
30
kph wind from N

Northern Ireland weather for Monday 22nd September 2025

Expect scattered clouds in Northern Ireland with a maximum temperature of 12°C, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north.