Harleston Rainfall ForecastUnited KingdomSWDevonHarlestonToday 12 May10%Wed 13 May40%Thu 14 May35%Fri 15 May30%Sat 16 May10%Sun 17 May55%Harleston rainfall forecast issued today at 7:38 am. Next forecast at approx. 9:38 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Cobbacombe Cross (Devon) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads