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.

Friday
22nd May
20

12

1

UV4
Saturday
23rd May
20

11

4

UV4
Sunday
24th May
23

11

1

UV3
Monday
25th May
23

11

10

UV6
Tuesday
26th May
19

10

5

UV6

5-day weather forecast updated at 04:03 on Thursday 21st 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 Friday 22nd May 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 76% chance of some rain and a moderate breeze of 23 kph from the south.

20
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
UV4
UV index (Moderate)
76
% chance of some rain
<5
mm of rainfall expected
20
°C wind chill
23
kph wind from S

Portstewart weather for Saturday 23rd May 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 14% chance of some rain and a gentle breeze of 19 kph from the south-west.

20
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
UV4
UV index (Moderate)
14
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
19
kph wind from SW

Portstewart weather for Sunday 24th May 2026

Expect overcast skies in Portstewart, Northern Ireland with a maximum temperature of 23°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 17 kph from the south.

23
°C maximum temperature
11
°C minimum temperature
overcast skies
1
hour of sunshine
UV3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
17
kph wind from S

Portstewart weather for Monday 25th May 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 23°C, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the north-west.

23
°C maximum temperature
11
°C minimum temperature
broken clouds
10
hours of sunshine
UV6
UV index (High)
0
mm of rainfall expected
23
°C wind chill
12
kph wind from NW

Portstewart weather for Tuesday 26th May 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 19°C, maximum UV of 6 (High) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 8 kph from the north-east.