Portchester Weather Forecast
- 10
- 13
Light rain
- 9
- 14
Cloudy
- 12
- 14
Light rain shower
- 12
- 15
Light rain shower
- 12
- 16
Partly cloudy
- 14
- 18
Partly cloudy
- 14
- 20
Sunny day
Today 16 May London and South East England
Largely dry and bright, after a chilly start. Cloud increasing from the west during the late afternoon, bringing some outbreaks of rain across all parts through the evening. Maximum temperature 15 °C.
Portchester Temperature Statistics
May Temperature
Thorney Island (14km)
Lowest 12 May, 2026
2 °CAverage May
11.5 °CHighest 9 May, 2026
21.2 °C
Climate (2021–Present)
Thorney Island (14km)
Average Low 2021–2026
8.9 °CAverage 2021–2026
12.1 °CAverage High 2021–2026
15.3 °C