Portsmouth Harbour Entrance Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour EntranceToday 27 Sep85%Mon 28 Sep40%Tue 29 Sep50%Wed 30 Sep55%Thu 1 Oct10%Fri 2 Oct5%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Portsmouth Harbour Entrance rainfall forecast issued today at 1:08 am. Next forecast at approx. 3:08 pm. Rainfall Rainfall AccumulationDean Hill (Wiltshire) RadarGet WillyWeather+ to remove ads