Merstham Rainfall ForecastUnited KingdomSESurreyMersthamToday 31 Mar55%Wed 1 Apr10%Thu 2 Apr10%Fri 3 Apr45%Sat 4 Apr45%Sun 5 Apr10%Mon 6 Apr10%Merstham rainfall forecast issued today at 7:39 am. Next forecast at approx. 9:39 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Thurnham (Kent) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads