Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 19°C. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Tuesday
25th Aug
19

13

2

3
Wednesday
26th Aug
20

15

2

2
Thursday
27th Aug
20

15

2

2
Friday
28th Aug
17

13

0

2
Saturday
29th Aug
17

12

0

2

5-day weather forecast updated at 04:03 on Tuesday 25th 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 Tuesday 25th August 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 19°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the south-east.

19
°C maximum temperature
13
°C minimum temperature
broken clouds
2
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
23
kph wind from SE

Portstewart weather for Wednesday 26th August 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 20°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 2-5 mm of rainfall expected with 43% chance of some rain and a moderate breeze of 21 kph from the south-east.

20
°C maximum temperature
15
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
2
UV index (Low)
43
% chance of some rain
<5
mm of rainfall expected
20
°C wind chill
21
kph wind from SE

Portstewart weather for Thursday 27th August 2026

Expect isolated thunderstorms in Portstewart, Northern Ireland with a maximum temperature of 20°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 90% chance of some rain and a gentle breeze of 16 kph from the north.

20
°C maximum temperature
15
°C minimum temperature
isolated thunderstorms
2
hours of sunshine
2
UV index (Low)
90
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
16
kph wind from N

Portstewart weather for Friday 28th August 2026

Expect mostly cloudy with rain in Portstewart, Northern Ireland with a maximum temperature of 17°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 70% chance of some rain and a moderate breeze of 24 kph from the north-west.

17
°C maximum temperature
13
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
2
UV index (Low)
70
% chance of some rain
<10
mm of rainfall expected
17
°C wind chill
24
kph wind from NW

Portstewart weather for Saturday 29th August 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 17°C, maximum UV of 2 (Low) and no hours of bright sunshine. There are 0-2 mm of rainfall expected with 50% chance of some rain and a moderate breeze of 22 kph from the north-west.