Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 21°C. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Monday
25th May
21

12

11

UV6
Tuesday
26th May
18

10

11

UV6
Wednesday
27th May
23

9

12

UV6
Thursday
28th May
22

12

6

UV6
Friday
29th May
20

11

5

UV5

5-day weather forecast updated at 04:03 on Sunday 24th 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 Monday 25th May 2026

Expect sunshine and showers in Portstewart, Northern Ireland with a maximum temperature of 21°C, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0-2 mm of rainfall expected with 1% chance of some rain and a gentle breeze of 14 kph from the north.

21
°C maximum temperature
12
°C minimum temperature
sunshine and showers
11
hours of sunshine
UV6
UV index (High)
1
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
14
kph wind from N

Portstewart weather for Tuesday 26th May 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 18°C, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the north.

18
°C maximum temperature
10
°C minimum temperature
broken clouds
11
hours of sunshine
UV6
UV index (High)
0
mm of rainfall expected
0
no heat & humidity
17
kph wind from N

Portstewart weather for Wednesday 27th May 2026

Expect scattered clouds in Portstewart, Northern Ireland with a maximum temperature of 23°C, maximum UV of 6 (High) and 12 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 26 kph from the south-east.

23
°C maximum temperature
9
°C minimum temperature
scattered clouds
12
hours of sunshine
UV6
UV index (High)
0
mm of rainfall expected
23
°C wind chill
26
kph wind from SE

Portstewart weather for Thursday 28th May 2026

Expect isolated thunderstorms in Portstewart, Northern Ireland with a maximum temperature of 22°C, maximum UV of 6 (High) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 33% chance of some rain and a gentle breeze of 17 kph from the south-east.

22
°C maximum temperature
12
°C minimum temperature
isolated thunderstorms
6
hours of sunshine
UV6
UV index (High)
33
% chance of some rain
<2
mm of rainfall expected
22
°C wind chill
17
kph wind from SE

Portstewart weather for Friday 29th May 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 22 kph from the west.