Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 23°C. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Sunday
24th May
23

13

3

UV4
Monday
25th May
21

11

6

UV4
Tuesday
26th May
18

10

11

UV5
Wednesday
27th May
21

9

11

UV6
Thursday
28th May
23

12

6

UV6

5-day weather forecast updated at 04:03 on Saturday 23rd May 2026 GMT

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

Portstewart weather forecast by day

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

Portstewart weather for Sunday 24th May 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 23°C, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south.

23
°C maximum temperature
13
°C minimum temperature
broken clouds
3
hours of sunshine
UV4
UV index (Moderate)
0
mm of rainfall expected
23
°C wind chill
17
kph wind from S

Portstewart weather for Monday 25th May 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the north-west.

21
°C maximum temperature
11
°C minimum temperature
broken clouds
6
hours of sunshine
UV4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
15
kph wind from NW

Portstewart weather for Tuesday 26th May 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the north.

18
°C maximum temperature
10
°C minimum temperature
broken clouds
11
hours of sunshine
UV5
UV index (Moderate)
0
mm of rainfall expected
18
°C wind chill
7
kph wind from N

Portstewart weather for Wednesday 27th May 2026

Expect scattered clouds in Portstewart, Northern Ireland with a maximum temperature of 21°C, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 kph from the south-east.

21
°C maximum temperature
9
°C minimum temperature
scattered clouds
11
hours of sunshine
UV6
UV index (High)
0
mm of rainfall expected
21
°C wind chill
7
kph wind from SE

Portstewart weather for Thursday 28th May 2026

Expect isolated thunderstorms in Portstewart, Northern Ireland with a maximum temperature of 23°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 28% chance of some rain and a light breeze of 8 kph from the north-east.