Portsmouth Harbour - Inner Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour - InnerToday 31 Oct90%Sat 1 Nov60%Sun 2 Nov15%Mon 3 Nov50%Tue 4 Nov75%Wed 5 Nov20%Portsmouth Harbour - Inner rainfall forecast issued today at 12:36 am. Next forecast at approx. 2:36 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Dean Hill (Wiltshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads