Walthamstow Reservoirs Rainfall ForecastUnited KingdomSEGreater LondonWalthamstow ReservoirsToday 23 Mar5%Tue 24 Mar90%Wed 25 Mar60%Thu 26 Mar15%Fri 27 Mar55%Sat 28 Mar15%Sun 29 Mar10%Walthamstow Reservoirs rainfall forecast issued today at 6:36 pm. Next forecast at approx. 8:36 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Chenies (Hertfordshire) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads