This page presents a long range weather forecast for Portsmouth in May as well as other months. You can quickly get a brief overview of the weather to expect in May on a daily basis.
The Portsmouth extended forecast data provided is based on the average values of previous years.
Long range weather forecast
Select a month and click on a day for more information:
Wednesday
May 1
19° / 12°
Thursday
May 2
23° / 13°
Friday
May 3
21° / 14°
Saturday
May 4
23° / 15°
Sunday
May 5
22° / 17°
Monday
May 6
25° / 18°
Tuesday
May 7
26° / 19°
Wednesday
May 8
29° / 19°
Thursday
May 9
27° / 19°
Friday
May 10
22° / 16°
Saturday
May 11
20° / 12°
Sunday
May 12
23° / 15°
Monday
May 13
23° / 15°
Tuesday
May 14
23° / 16°
Wednesday
May 15
24° / 16°
Thursday
May 16
21° / 15°
Friday
May 17
22° / 14°
Saturday
May 18
27° / 14°
Sunday
May 19
22° / 16°
Monday
May 20
27° / 16°
Tuesday
May 21
25° / 18°
Wednesday
May 22
27° / 18°
Thursday
May 23
24° / 19°
Friday
May 24
20° / 16°
Saturday
May 25
21° / 16°
Sunday
May 26
24° / 17°
Monday
May 27
24° / 19°
Tuesday
May 28
26° / 18°
Wednesday
May 29
25° / 19°
Thursday
May 30
24° / 17°
Friday
May 31
25° / 16°
Portsmouth 30 days weather forecast
Check out our estimated 30 days weather forecast for Portsmouth, this data is based on the average weather in Portsmouth in the last few years.
For a more accurate and detailed forecast, check out the 14 day weather for Portsmouth next to the desired date.