Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 59°F. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Thursday
20th Aug
59

54

4

4
Friday
21st Aug
75

50

8

3
Saturday
22nd Aug
59

48

8

3
Sunday
23rd Aug
63

50

5

4
Monday
24th Aug
63

48

7

3

5-day weather forecast updated at 04:03 on Wednesday 19th August 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 20th August 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 59°F, maximum UV of 4 (Moderate) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 32% chance of some rain and a moderate breeze of 16 mph from the north.

59
°F maximum temperature
54
°F minimum temperature
mostly cloudy with light rain
4
hours of sunshine
4
UV index (Moderate)
32
% chance of some rain
<5
mm of rainfall expected
59
°F wind chill
16
mph wind from N

Portstewart weather for Friday 21st August 2026

Expect sunshine and showers in Portstewart, Northern Ireland with a maximum temperature of 75°F, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0-2 mm of rainfall expected with 33% chance of some rain and a moderate breeze of 14 mph from the north.

75
°F maximum temperature
50
°F minimum temperature
sunshine and showers
8
hours of sunshine
3
UV index (Moderate)
33
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
14
mph wind from N

Portstewart weather for Saturday 22nd August 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 59°F, maximum UV of 3 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 12 mph from the north-west.

59
°F maximum temperature
48
°F minimum temperature
broken clouds
8
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
12
mph wind from NW

Portstewart weather for Sunday 23rd August 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 63°F, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 0 mm of rainfall expected and little or no wind of 4 mph from the west.

63
°F maximum temperature
50
°F minimum temperature
broken clouds
5
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
63
°F wind chill
4
mph wind from W

Portstewart weather for Monday 24th August 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 63°F, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the south-east.