Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 20°C. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Thursday
21st May
20

12

2

UV3
Friday
22nd May
22

13

1

UV4
Saturday
23rd May
20

12

4

UV4
Sunday
24th May
21

10

4

UV5
Monday
25th May
22

10

6

UV6

5-day weather forecast updated at 04:03 on Wednesday 20th 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 Thursday 21st May 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 20°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 75% chance of some rain and a moderate breeze of 25 kph from the south.

20
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
UV3
UV index (Moderate)
75
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
25
kph wind from S

Portstewart weather for Friday 22nd May 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 69% chance of some rain and a moderate breeze of 20 kph from the south.

22
°C maximum temperature
13
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
UV4
UV index (Moderate)
69
% chance of some rain
<5
mm of rainfall expected
22
°C wind chill
20
kph wind from S

Portstewart weather for Saturday 23rd May 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south-west.

20
°C maximum temperature
12
°C minimum temperature
broken clouds
4
hours of sunshine
UV4
UV index (Moderate)
0
mm of rainfall expected
20
°C wind chill
16
kph wind from SW

Portstewart weather for Sunday 24th May 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 21°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 15 kph from the south.

21
°C maximum temperature
10
°C minimum temperature
broken clouds
4
hours of sunshine
UV5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
15
kph wind from S

Portstewart weather for Monday 25th May 2026

Expect broken clouds 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 mm of rainfall expected and a gentle breeze of 19 kph from the south-west.