Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 16°C. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Tuesday
19th May
16

10

0

UV2
Wednesday
20th May
16

10

6

UV5
Thursday
21st May
22

11

2

UV3
Friday
22nd May
20

13

1

UV4
Saturday
23rd May
19

11

4

UV5

5-day weather forecast updated at 04:03 on Tuesday 19th 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 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 no hours of bright sunshine. There are 5-10 mm of rainfall expected with 90% chance of some rain and a fresh breeze of 34 kph from the south.

16
°C maximum temperature
10
°C minimum temperature
cloudy with some rain
0
hours of sunshine
UV2
UV index (Low)
90
% chance of some rain
<10
mm of rainfall expected
16
°C wind chill
34
kph wind from S

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 5 (Moderate) and 6 hours of bright sunshine. There are 0-2 mm of rainfall expected with 42% chance of some rain and a moderate breeze of 23 kph from the west.

16
°C maximum temperature
10
°C minimum temperature
mostly cloudy with light rain
6
hours of sunshine
UV5
UV index (Moderate)
42
% chance of some rain
<2
mm of rainfall expected
16
°C wind chill
23
kph wind from W

Portstewart weather for Thursday 21st May 2026

Expect cloudy with some rain in Portstewart, Northern Ireland with a maximum temperature of 22°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 5-10 mm of rainfall expected with 70% chance of some rain and a gentle breeze of 18 kph from the south.

22
°C maximum temperature
11
°C minimum temperature
cloudy with some rain
2
hours of sunshine
UV3
UV index (Moderate)
70
% chance of some rain
<10
mm of rainfall expected
22
°C wind chill
18
kph wind from S

Portstewart weather for Friday 22nd May 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 20°C, maximum UV of 4 (Moderate) and 1 hour of bright sunshine. There are 0-2 mm of rainfall expected with 54% chance of some rain and a gentle breeze of 18 kph from the south.

20
°C maximum temperature
13
°C minimum temperature
mostly cloudy with light rain
1
hour of sunshine
UV4
UV index (Moderate)
54
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
18
kph wind from S

Portstewart weather for Saturday 23rd May 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 19°C, maximum UV of 5 (Moderate) and 4 hours of bright sunshine. There are 0-2 mm of rainfall expected with 32% chance of some rain and a gentle breeze of 13 kph from the north-west.