Portsmouth Harbour - M275 Motorway Bridge Weather Forecast
- 18
- 24
Light rain
- 16
- 21
Thunder shower
- 17
- 22
Heavy rain shower
- 16
- 20
Light rain
- 15
- 21
Light rain shower
- 16
- 22
Light rain shower
Today 19 Jul London and South East England
Turning slightly cooler and unsettled with widespread, often heavy and thundery rain or showers lasting much of the day, likely clearing into the evening to give another muggy night. Maximum Temperature 25C.
Portsmouth Harbour - M275 Motorway Bridge Temperature Statistics
July Temperature
Thorney Island (11km)
Lowest 3 July, 2025
10.3 °CAverage July
19.4 °CHighest 1 July, 2025
27.4 °C
Climate (2020–Present)
Thorney Island (11km)
Average Low 2020–2025
8.6 °CAverage 2020–2025
11.9 °CAverage High 2020–2025
15.1 °C