Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 21°C. Select a day from the live weather forecast for Portsmouth, England, UK for more weather parameters.

Friday
1st Aug
21

14

8

4
Saturday
2nd Aug
22

15

9

4
Sunday
3rd Aug
23

16

2

3
Monday
4th Aug
21

18

4

2
Tuesday
5th Aug
21

15

8

6

5-day weather forecast updated at 04:01 on Friday 1st August 2025 GMT

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The 5-day weather forecast for England (Portsmouth) is provided by the Swiss meteorological agency, meteoblue. Find out more about our data sources.

Portsmouth weather forecast by day

Below are the detailed weather forecasts for Portsmouth for the next 5 days.

Portsmouth weather for Friday 1st August 2025

Expect scattered clouds in Portsmouth, England with a maximum temperature of 21°C, maximum UV of 4 (Moderate) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 20 kph from the north-west.

21
°C maximum temperature
14
°C minimum temperature
scattered clouds
8
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
0
no heat & humidity
20
kph wind from NW

Portsmouth weather for Saturday 2nd August 2025

Expect scattered clouds in Portsmouth, England with a maximum temperature of 22°C, maximum UV of 4 (Moderate) and 9 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 16 kph from the north-west.

22
°C maximum temperature
15
°C minimum temperature
scattered clouds
9
hours of sunshine
4
UV index (Moderate)
0
mm of rainfall expected
22
°C wind chill
16
kph wind from NW

Portsmouth weather for Sunday 3rd August 2025

Expect broken clouds in Portsmouth, England with a maximum temperature of 23°C, maximum UV of 3 (Moderate) and 2 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 24 kph from the west.

23
°C maximum temperature
16
°C minimum temperature
broken clouds
2
hours of sunshine
3
UV index (Moderate)
0
mm of rainfall expected
23
°C wind chill
24
kph wind from W

Portsmouth weather for Monday 4th August 2025

Expect mostly cloudy with light rain in Portsmouth, England with a maximum temperature of 21°C, maximum UV of 2 (Low) and 4 hours of bright sunshine. There are 2-5 mm of rainfall expected with 48% chance of some rain and a fresh breeze of 35 kph from the south-west.

21
°C maximum temperature
18
°C minimum temperature
mostly cloudy with light rain
4
hours of sunshine
2
UV index (Low)
48
% chance of some rain
<5
mm of rainfall expected
21
°C wind chill
35
kph wind from SW

Portsmouth weather for Tuesday 5th August 2025

Expect scattered clouds in Portsmouth, England with a maximum temperature of 21°C, maximum UV of 6 (High) and 8 hours of bright sunshine. There are 0 mm of rainfall expected and a moderate breeze of 26 kph from the north-west.