Portland Harbour Rainfall ForecastUnited KingdomSWDorsetPortland HarbourToday 1 Jun95%Tue 2 Jun70%Wed 3 Jun55%Thu 4 Jun40%Fri 5 Jun35%Sat 6 Jun40%Portland Harbour rainfall forecast issued yesterday at 7:36 pm. Next forecast at approx. 9:36 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