Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 28°C. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Thursday
25th Jun
28

14

10

6
Friday
26th Jun
22

17

1

4
Saturday
27th Jun
22

16

5

4
Sunday
28th Jun
18

12

9

6
Monday
29th Jun
19

11

2

5

5-day weather forecast updated at 04:04 on Thursday 25th 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 Thursday 25th June 2026

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 28°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 gentle breeze of 19 kph from the south-east.

28
°C maximum temperature
14
°C minimum temperature
broken clouds
10
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
19
kph wind from SE

Portstewart weather for Friday 26th June 2026

Expect isolated thunderstorms in Portstewart, Northern Ireland with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 2-5 mm of rainfall expected with 60% chance of some rain and a gentle breeze of 14 kph from the north-west.

22
°C maximum temperature
17
°C minimum temperature
isolated thunderstorms
1
hour of sunshine
4
UV index (Moderate)
60
% chance of some rain
<5
mm of rainfall expected
22
°C wind chill
14
kph wind from NW

Portstewart weather for Saturday 27th June 2026

Expect mostly cloudy with rain in Portstewart, Northern Ireland with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 5 hours of bright sunshine. There are 5-10 mm of rainfall expected with 66% chance of some rain and a fresh breeze of 37 kph from the south.

22
°C maximum temperature
16
°C minimum temperature
mostly cloudy with rain
5
hours of sunshine
4
UV index (Moderate)
66
% chance of some rain
<10
mm of rainfall expected
0
no heat & humidity
37
kph wind from S

Portstewart weather for Sunday 28th June 2026

Expect sunshine and showers in Portstewart, Northern Ireland with a maximum temperature of 18°C, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 46% chance of some rain and a moderate breeze of 25 kph from the south-west.

18
°C maximum temperature
12
°C minimum temperature
sunshine and showers
9
hours of sunshine
6
UV index (High)
46
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
25
kph wind from SW

Portstewart weather for Monday 29th June 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 2 hours of bright sunshine. There are 0-2 mm of rainfall expected with 76% chance of some rain and a moderate breeze of 21 kph from the south-west.