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.

Wednesday
2nd Sep
19

14

1

2
Thursday
3rd Sep
19

14

3

2
Friday
4th Sep
17

11

5

3
Saturday
5th Sep
17

10

3

2
Sunday
6th Sep
20

12

2

2

5-day weather forecast updated at 04:03 on Wednesday 2nd 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 Wednesday 2nd 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 2-5 mm of rainfall expected with 58% chance of some rain and a moderate breeze of 22 kph from the south.

19
°C maximum temperature
14
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
2
UV index (Low)
58
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
22
kph wind from S

Portstewart weather for Thursday 3rd 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 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 56% chance of some rain and a moderate breeze of 23 kph from the south-west.

19
°C maximum temperature
14
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
2
UV index (Low)
56
% chance of some rain
<2
mm of rainfall expected
19
°C wind chill
23
kph wind from SW

Portstewart weather for Friday 4th 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 61% chance of some rain and a fresh breeze of 36 kph from the west.

17
°C maximum temperature
11
°C minimum temperature
mostly cloudy with light rain
5
hours of sunshine
3
UV index (Moderate)
61
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
36
kph wind from W

Portstewart weather for Saturday 5th 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 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 46% chance of some rain and a fresh breeze of 31 kph from the south-east.

17
°C maximum temperature
10
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
2
UV index (Low)
46
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
31
kph wind from SE

Portstewart weather for Sunday 6th September 2026

Expect mostly cloudy with 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 10-20 mm of rainfall expected with 68% chance of some rain and a fresh breeze of 31 kph from the south.