Portstewart weather live forecast

Tomorrow's maximum temperature in Portstewart is expected to be 17°C.

Wednesday
18th Jun

17

13

1
Thursday
19th Jun

26

12

11
Friday
20th Jun

27

15

10
Saturday
21st Jun

26

16

5
Sunday
22nd Jun

19

12

6

5-day weather forecast updated at 04:03 on Wednesday 18th June 2025 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 18th June 2025

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 17°C, maximum UV of 5 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 46% chance of some rain and a gentle breeze of 14 kph from the south-west.

17
°C maximum temperature
13
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
5
UV index (Moderate)
46
% chance of some rain
<5
mm of rainfall expected
0
no heat & humidity
14
kph wind from SW

Portstewart weather for Thursday 19th June 2025

Expect scattered clouds in Portstewart, Northern Ireland with a maximum temperature of 26°C, maximum UV of 6 (High) and 11 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 23 kph from the south.

26
°C maximum temperature
12
°C minimum temperature
scattered clouds
11
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
26
°C wind chill
23
kph wind from S

Portstewart weather for Friday 20th June 2025

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 27°C, low levels of heat & humidity, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 27 kph from the south.

27
°C maximum temperature
15
°C minimum temperature
broken clouds
10
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
27
kph wind from S

Portstewart weather for Saturday 21st June 2025

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 26°C, maximum UV of 3 (Moderate) and 5 hours of bright sunshine. There are 0-2 mm of rainfall expected with 44% chance of some rain and a gentle breeze of 17 kph from the south.

26
°C maximum temperature
16
°C minimum temperature
mostly cloudy with light rain
5
hours of sunshine
3
UV index (Moderate)
44
% chance of some rain
<2
mm of rainfall expected
26
°C wind chill
17
kph wind from S

Portstewart weather for Sunday 22nd June 2025

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 19°C, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 53% chance of some rain and a gentle breeze of 13 kph from the west.