Portstewart weather live forecast

Today's maximum temperature in Portstewart is expected to be 70°F. Select a day from the live weather forecast for Portstewart, Northern Ireland, UK for more weather parameters.

Tuesday
4th Aug
70

59

3

3
Wednesday
5th Aug
61

55

1

1
Thursday
6th Aug
63

52

3

4
Friday
7th Aug
66

50

7

3
Saturday
8th Aug
66

54

0

3

5-day weather forecast updated at 04:03 on Tuesday 4th August 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 4th August 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 70°F, maximum UV of 3 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 76% chance of some rain and a moderate breeze of 15 mph from the south-east.

70
°F maximum temperature
59
°F minimum temperature
mostly cloudy with light rain
3
hours of sunshine
3
UV index (Moderate)
76
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
15
mph wind from SE

Portstewart weather for Wednesday 5th August 2026

Expect isolated thunderstorms in Portstewart, Northern Ireland with a maximum temperature of 61°F, maximum UV of 1 (Low) and 1 hour of bright sunshine. There are 5-10 mm of rainfall expected with 85% chance of some rain and a strong breeze of 25 mph from the north-west.

61
°F maximum temperature
55
°F minimum temperature
isolated thunderstorms
1
hour of sunshine
1
UV index (Low)
85
% chance of some rain
<10
mm of rainfall expected
61
°F wind chill
25
mph wind from NW

Portstewart weather for Thursday 6th August 2026

Expect mostly cloudy with light rain in Portstewart, Northern Ireland with a maximum temperature of 63°F, maximum UV of 4 (Moderate) and 3 hours of bright sunshine. There are 0-2 mm of rainfall expected with 36% chance of some rain and a moderate breeze of 17 mph from the north-west.

63
°F maximum temperature
52
°F minimum temperature
mostly cloudy with light rain
3
hours of sunshine
4
UV index (Moderate)
36
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
17
mph wind from NW

Portstewart weather for Friday 7th August 2026

Expect sunshine and showers in Portstewart, Northern Ireland with a maximum temperature of 66°F, maximum UV of 3 (Moderate) and 7 hours of bright sunshine. There are 0-2 mm of rainfall expected with 52% chance of some rain and a gentle breeze of 12 mph from the south.

66
°F maximum temperature
50
°F minimum temperature
sunshine and showers
7
hours of sunshine
3
UV index (Moderate)
52
% chance of some rain
<2
mm of rainfall expected
0
no heat & humidity
12
mph wind from S

Portstewart weather for Saturday 8th August 2026

Expect mostly cloudy with rain in Portstewart, Northern Ireland with a maximum temperature of 66°F, maximum UV of 3 (Moderate) and no hours of bright sunshine. There are 5-10 mm of rainfall expected with 71% chance of some rain and a moderate breeze of 13 mph from the south.