Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 22°C. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Sunday
6th Sep
22

15

2

2
Monday
7th Sep
17

12

2

2
Tuesday
8th Sep
15

10

4

2
Wednesday
9th Sep
16

9

4

2
Thursday
10th Sep
19

9

1

2

5-day weather forecast updated at 04:03 on Sunday 6th September 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 Sunday 6th September 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 22°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 34% chance of some rain and a fresh breeze of 33 kph from the south.

22
°C maximum temperature
15
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
2
UV index (Low)
34
% chance of some rain
<2
mm of rainfall expected
22
°C wind chill
33
kph wind from S

Portstewart weather for Monday 7th September 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 17°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 62% chance of some rain and a fresh breeze of 29 kph from the south-west.

17
°C maximum temperature
12
°C minimum temperature
mostly cloudy with light rain
2
hours of sunshine
2
UV index (Low)
62
% chance of some rain
<2
mm of rainfall expected
17
°C wind chill
29
kph wind from SW

Portstewart weather for Tuesday 8th September 2026

Expect mostly cloudy with rain in Portstewart, Northern Ireland with a maximum temperature of 15°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 5-10 mm of rainfall expected with 82% chance of some rain and a strong breeze of 39 kph from the west.

15
°C maximum temperature
10
°C minimum temperature
mostly cloudy with rain
4
hours of sunshine
2
UV index (Low)
82
% chance of some rain
<10
mm of rainfall expected
15
°C wind chill
39
kph wind from W

Portstewart weather for Wednesday 9th September 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 16°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 40% chance of some rain and a fresh breeze of 33 kph from the north-west.

16
°C maximum temperature
9
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
2
UV index (Low)
40
% chance of some rain
<2
mm of rainfall expected
16
°C wind chill
33
kph wind from NW

Portstewart weather for Thursday 10th September 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 19°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 69% chance of some rain and a gentle breeze of 18 kph from the south.