Merstham Rainfall ForecastUnited KingdomSESurreyMersthamToday 2 Oct15%Sat 3 Oct15%Sun 4 Oct15%Mon 5 Oct15%Tue 6 Oct35%Wed 7 Oct15%Thu 8 Oct5%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Merstham rainfall forecast issued today at 1:09 pm. Next forecast at approx. 3:09 am. Rainfall Rainfall AccumulationThurnham (Kent) RadarGet WillyWeather+ to remove ads