Blackwater Rainfall ForecastUnited KingdomSEHampshireBlackwaterToday 23 Feb15%Tue 24 Feb15%Wed 25 Feb35%Thu 26 Feb60%Fri 27 Feb45%Sat 28 Feb55%Sun 1 Mar50%Blackwater rainfall forecast issued today at 6:37 pm. Next forecast at approx. 8:37 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