Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 18°C. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Saturday
5th Sep
18

13

3

3
Sunday
6th Sep
22

15

3

2
Monday
7th Sep
17

11

5

2
Tuesday
8th Sep
15

11

3

2
Wednesday
9th Sep
17

10

5

3

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

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 18°C, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 25 kph from the west.

18
°C maximum temperature
13
°C minimum temperature
broken clouds
3
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
18
°C wind chill
25
kph wind from W

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 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 48% chance of some rain and a fresh breeze of 34 kph from the south.

22
°C maximum temperature
15
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
2
UV index (Low)
48
% chance of some rain
<2
mm of rainfall expected
22
°C wind chill
34
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 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 55% chance of some rain and a fresh breeze of 36 kph from the south-west.

17
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
5
hours of sunshine
2
UV index (Low)
55
% chance of some rain
<2
mm of rainfall expected
17
°C wind chill
36
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 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 91% chance of some rain and a fresh breeze of 31 kph from the north-west.

15
°C maximum temperature
11
°C minimum temperature
mostly cloudy with rain
3
hours of sunshine
2
UV index (Low)
91
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
31
kph wind from NW

Portstewart weather for Wednesday 9th September 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 17°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 53% chance of some rain and a moderate breeze of 28 kph from the north-west.