Portland Rainfall ForecastUnited KingdomSWDorsetPortlandToday 23 Oct80%Fri 24 Oct30%Sat 25 Oct25%Sun 26 Oct15%Mon 27 Oct10%Tue 28 Oct15%Portland rainfall forecast issued today at 7:36 am. Next forecast at approx. 9:36 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