River Arun Entrance Rainfall ForecastUnited KingdomSEWest SussexRiver Arun EntranceToday 16 Dec15%Wed 17 Dec95%Thu 18 Dec90%Fri 19 Dec5%Sat 20 Dec50%Sun 21 Dec45%Mon 22 Dec15%River Arun Entrance rainfall forecast issued today at 12:38 pm. Next forecast at approx. 2:38 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