For this time of the year, Portsmouth is experiencing slightly cooler temperatures, gently falling below the seasonal average.
According to the long-range forecast, temperatures are expected to be 9.9 °C which is -1.1 °C lower than the historical average.
Select a month and click on a day for more information:
Thursday
Jan 1
9° / 6°
Friday
Jan 2
11° / 8°
Saturday
Jan 3
12° / 5°
Sunday
Jan 4
10° / 6°
Monday
Jan 5
10° / 4°
Tuesday
Jan 6
9° / 4°
Wednesday
Jan 7
6° / 2°
Thursday
Jan 8
5° / 1°
Friday
Jan 9
9° / 2°
Saturday
Jan 10
10° / 2°
Sunday
Jan 11
9° / 3°
Monday
Jan 12
13° / 4°
Tuesday
Jan 13
12° / 5°
Wednesday
Jan 14
10° / 4°
Thursday
Jan 15
7° / 2°
Friday
Jan 16
8° / 1°
Saturday
Jan 17
6° / 1°
Sunday
Jan 18
9° / 2°
Monday
Jan 19
11° / 3°
Tuesday
Jan 20
5° / 1°
Wednesday
Jan 21
3° / -1°
Thursday
Jan 22
5° / 0°
Friday
Jan 23
5° / -1°
Saturday
Jan 24
8° / 2°
Sunday
Jan 25
11° / 5°
Monday
Jan 26
10° / 5°
Tuesday
Jan 27
9° / 4°
Wednesday
Jan 28
9° / 3°
Thursday
Jan 29
7° / 1°
Friday
Jan 30
6° / 1°
Saturday
Jan 31
9° / 3°
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.