Portsmouth Harbour - Inner Rainfall ForecastUnited KingdomSEHampshirePortsmouth Harbour - InnerToday 30 Dec10%Wed 31 Dec15%Thu 1 Jan5%Fri 2 Jan5%Sat 3 Jan5%Sun 4 Jan5%Mon 5 Jan10%Portsmouth Harbour - Inner rainfall forecast issued today at 12:38 pm. Next forecast at approx. 2:38 am.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