Portsea Island Rainfall ForecastUnited KingdomSEHampshirePortsea IslandToday 15 Sep35%Tue 16 Sep85%Wed 17 Sep50%Thu 18 Sep25%Fri 19 Sep15%Sat 20 Sep15%Sun 21 Sep10%Portsea Island rainfall forecast issued today at 1:37 pm. Next forecast at approx. 3:37 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