Portsmouth weather live forecast

Today's maximum temperature in Portsmouth is expected to be 29°C. Select a day from the live weather forecast for Portsmouth, England, UK for more weather parameters.

Wednesday
12th Aug
29

18

14

6
Thursday
13th Aug
31

21

10

6
Friday
14th Aug
30

19

10

6
Saturday
15th Aug
26

18

9

6
Sunday
16th Aug
25

15

9

6

5-day weather forecast updated at 04:01 on Wednesday 12th August 2026 GMT

More about Portsmouth

Portsmouth by month

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Recommended for England

Spabreaks.com promo code: 8% off bookings & vouchers

Exclusive

Save 8% on spa breaks, spa days & gift vouchers
Check out latest offers on over 550 spas across the UK
A guaranteed experience to suit your budget & occasion

Show discount code

******SB8

Redeem Spabreaks.com discount code >>

Expires at 23:59 on Thursday 31st Dec 2026 · View all Spabreaks.com offers

Spa break finder

Destination

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 Wednesday 12th August 2026

Expect clear skies in Portsmouth, England with a maximum temperature of 29°C, low levels of heat & humidity, maximum UV of 6 (High) and 14 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the east.

29
°C maximum temperature
18
°C minimum temperature
clear skies
14
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
L
low heat & humidity
12
kph wind from E

Portsmouth weather for Thursday 13th August 2026

Expect scattered clouds in Portsmouth, England with a maximum temperature of 31°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a light breeze of 12 kph from the south-east.

31
°C maximum temperature
21
°C minimum temperature
scattered clouds
10
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
12
kph wind from SE

Portsmouth weather for Friday 14th August 2026

Expect scattered clouds in Portsmouth, England with a maximum temperature of 30°C, moderate levels of heat & humidity, maximum UV of 6 (High) and 10 hours of bright sunshine. There are 0 mm of rainfall expected and a gentle breeze of 19 kph from the west.

30
°C maximum temperature
19
°C minimum temperature
scattered clouds
10
hours of sunshine
6
UV index (High)
0
mm of rainfall expected
M
moderate heat & humidity
19
kph wind from W

Portsmouth weather for Saturday 15th August 2026

Expect sunshine and showers in Portsmouth, England with a maximum temperature of 26°C, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 0-2 mm of rainfall expected with 6% chance of some rain and a gentle breeze of 16 kph from the north.

26
°C maximum temperature
18
°C minimum temperature
sunshine and showers
9
hours of sunshine
6
UV index (High)
6
% chance of some rain
<2
mm of rainfall expected
26
°C wind chill
16
kph wind from N

Portsmouth weather for Sunday 16th August 2026

Expect sunshine and showers in Portsmouth, England with a maximum temperature of 25°C, maximum UV of 6 (High) and 9 hours of bright sunshine. There are 2-5 mm of rainfall expected with 13% chance of some rain and a light breeze of 12 kph from the north.