Southwick Rainfall ForecastUnited KingdomSEHampshireSouthwickToday 16 Sep90%Wed 17 Sep80%Thu 18 Sep15%Fri 19 Sep15%Sat 20 Sep20%Sun 21 Sep35%Mon 22 Sep10%Southwick rainfall forecast issued today at 1:37 pm. Next forecast at approx. 3:37 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