Portland Rainfall ForecastUnited KingdomSWDorsetPortlandToday 24 Mar65%Wed 25 Mar35%Thu 26 Mar15%Fri 27 Mar50%Sat 28 Mar15%Sun 29 Mar15%Mon 30 Mar10%Portland 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