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
17th Jun
19

14

5

4
Thursday
18th Jun
19

12

0

1
Friday
19th Jun
19

12

2

2
Saturday
20th Jun
18

10

9

5
Sunday
21st Jun
20

9

8

5

5-day weather forecast updated at 04:03 on Wednesday 17th June 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 17th June 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 2-5 mm of rainfall expected with 21% 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
5
hours of sunshine
4
UV index (Moderate)
21
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
23
kph wind from SW

Portstewart weather for Thursday 18th June 2026

Expect mostly cloudy with rain in Portstewart, Northern Ireland with a maximum temperature of 19°C, maximum UV of 1 (Low) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 73% chance of some rain and a moderate breeze of 20 kph from the south.

19
°C maximum temperature
12
°C minimum temperature
mostly cloudy with rain
0
hours of sunshine
1
UV index (Low)
73
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
20
kph wind from S

Portstewart weather for Friday 19th June 2026

Expect mostly cloudy with rain in Portstewart, Northern Ireland with a maximum temperature of 19°C, maximum UV of 2 (Low) and 2 hours of bright sunshine. There are 10-20 mm of rainfall expected with 90% chance of some rain and a gentle breeze of 15 kph from the north-west.

19
°C maximum temperature
12
°C minimum temperature
mostly cloudy with rain
2
hours of sunshine
2
UV index (Low)
90
% chance of some rain
<20
mm of rainfall expected
19
°C wind chill
15
kph wind from NW

Portstewart weather for Saturday 20th June 2026

Expect sunshine and showers in Portstewart, Northern Ireland with a maximum temperature of 18°C, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 40% chance of some rain and a moderate breeze of 20 kph from the south-west.

18
°C maximum temperature
10
°C minimum temperature
sunshine and showers
9
hours of sunshine
5
UV index (Moderate)
40
% chance of some rain
<2
mm of rainfall expected
18
°C wind chill
20
kph wind from SW

Portstewart weather for Sunday 21st June 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 20°C, maximum UV of 5 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 18 kph from the south-west.