RNAS Portland Heliport Airport Rainfall ForecastUnited KingdomSWDorsetRNAS Portland Heliport AirportToday 13 Dec5%Sun 14 Dec10%Mon 15 Dec45%Tue 16 Dec45%Wed 17 Dec75%Thu 18 Dec80%Fri 19 Dec10%RNAS Portland Heliport Airport rainfall forecast issued today at 6:36 pm. Next forecast at approx. 8:36 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