Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 13°C. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Sunday
17th May
13

6

3

2
Monday
18th May
14

5

1

3
Tuesday
19th May
16

9

1

2
Wednesday
20th May
16

10

1

4
Thursday
21st May
19

9

1

3

5-day weather forecast updated at 04:03 on Sunday 17th May 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 Sunday 17th May 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 13°C, maximum UV of 2 (Low) and 3 hours of bright sunshine. There are 2-5 mm of rainfall expected with 85% chance of some rain and a moderate breeze of 22 kph from the west.

13
°C maximum temperature
6
°C minimum temperature
mostly cloudy with light rain
3
hours of sunshine
2
UV index (Low)
85
% chance of some rain
<5
mm of rainfall expected
13
°C wind chill
22
kph wind from W

Portstewart weather for Monday 18th May 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 14°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 82% chance of some rain and a fresh breeze of 30 kph from the south-east.

14
°C maximum temperature
5
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
3
UV index (Moderate)
82
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
30
kph wind from SE

Portstewart weather for Tuesday 19th May 2026

Expect cloudy with some rain in Portstewart, Northern Ireland with a maximum temperature of 16°C, maximum UV of 2 (Low) and 1 hour of bright sunshine. There are 10-20 mm of rainfall expected with 95% chance of some rain and a fresh breeze of 32 kph from the south-east.

16
°C maximum temperature
9
°C minimum temperature
cloudy with some rain
1
hour of sunshine
2
UV index (Low)
95
% chance of some rain
<20
mm of rainfall expected
0
no heat & humidity
32
kph wind from SE

Portstewart weather for Wednesday 20th May 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 16°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 63% chance of some rain and a moderate breeze of 23 kph from the south-west.

16
°C maximum temperature
10
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
4
UV index (Moderate)
63
% chance of some rain
<2
mm of rainfall expected
16
°C wind chill
23
kph wind from SW

Portstewart weather for Thursday 21st May 2026

Expect overcast skies in Portstewart, Northern Ireland with a maximum temperature of 19°C, maximum UV of 3 (Moderate) and 1 hour of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 13 kph from the west.