Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 73°F. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Saturday
16th Aug
73

57

9

5
Sunday
17th Aug
77

57

7

5
Monday
18th Aug
81

59

9

4
Tuesday
19th Aug
79

59

6

4
Wednesday
20th Aug
77

57

3

5

5-day weather forecast updated at 04:04 on Friday 15th August 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 Saturday 16th August 2025

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 73°F, maximum UV of 5 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 10 mph from the north.

73
°F maximum temperature
57
°F minimum temperature
broken clouds
9
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
73
°F wind chill
10
mph wind from N

Portstewart weather for Sunday 17th August 2025

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 77°F, maximum UV of 5 (Moderate) and 7 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 13 mph from the south-east.

77
°F maximum temperature
57
°F minimum temperature
broken clouds
7
hours of sunshine
5
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
13
mph wind from SE

Portstewart weather for Monday 18th August 2025

Expect scattered clouds in Portstewart, Northern Ireland with a maximum temperature of 81°F, low levels of heat & humidity, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 8 mph from the south-east.

81
°F maximum temperature
59
°F minimum temperature
scattered clouds
9
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
L
low heat & humidity
8
mph wind from SE

Portstewart weather for Tuesday 19th August 2025

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 79°F, maximum UV of 4 (Moderate) and 6 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 7 mph from the east.

79
°F maximum temperature
59
°F minimum temperature
broken clouds
6
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
79
°F wind chill
7
mph wind from E

Portstewart weather for Wednesday 20th August 2025

Expect broken clouds in Portstewart, Northern Ireland with a maximum temperature of 77°F, maximum UV of 5 (Moderate) and 3 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 9 mph from the south-east.