Portland Harbour Rainfall ForecastUnited KingdomSWDorsetPortland HarbourToday 21 Nov65%Fri 22 Nov90%Sat 23 Nov95%Sun 24 Nov85%Mon 25 Nov30%Tue 26 Nov40%Wed 27 Nov5%Portland Harbour rainfall forecast issued today at 6:38 pm. Next forecast at approx. 8:38 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