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
26th Sep
18

12

7

2
Sunday
27th Sep
14

9

3

2
Monday
28th Sep
15

7

6

2
Tuesday
29th Sep
18

9

1

1
Wednesday
30th Sep
18

10

3

2

5-day weather forecast updated at 04:03 on Saturday 26th 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 26th September 2026

Expect scattered clouds in Portstewart, Northern Ireland with a maximum temperature of 18°C, maximum UV of 2 (Low) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 28 kph from the south-west.

18
°C maximum temperature
12
°C minimum temperature
scattered clouds
7
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
18
°C wind chill
28
kph wind from SW

Portstewart weather for Sunday 27th September 2026

Expect mostly cloudy with rain in Portstewart, Northern Ireland with a maximum temperature of 14°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 5-10 mm of rainfall expected with 98% chance of some rain and a fresh breeze of 31 kph from the south.

14
°C maximum temperature
9
°C minimum temperature
mostly cloudy with rain
3
hours of sunshine
2
UV index (Low)
98
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
31
kph wind from S

Portstewart weather for Monday 28th September 2026

Expect scattered clouds in Portstewart, Northern Ireland with a maximum temperature of 15°C, maximum UV of 2 (Low) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the south.

15
°C maximum temperature
7
°C minimum temperature
scattered clouds
6
hours of sunshine
2
UV index (Low)
0
mm of rainfall expected
0
no heat & humidity
16
kph wind from S

Portstewart weather for Tuesday 29th September 2026

Expect mostly cloudy with rain in Portstewart, Northern Ireland with a maximum temperature of 18°C, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 76% chance of some rain and a strong breeze of 40 kph from the south-east.

18
°C maximum temperature
9
°C minimum temperature
mostly cloudy with rain
1
hour of sunshine
1
UV index (Low)
76
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
40
kph wind from SE

Portstewart weather for Wednesday 30th September 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 18°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 53% chance of some rain and a moderate breeze of 25 kph from the south.