Grafham Water Rainfall ForecastUnited KingdomEECambridgeshireGrafham WaterToday 13 Oct70%Wed 14 Oct10%Thu 15 Oct65%Fri 16 Oct65%Sat 17 OctNo RainSun 18 Oct15%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Grafham Water rainfall forecast issued yesterday at 7:09 pm. Next forecast at approx. 9:09 am. Rainfall Rainfall AccumulationChenies (Hertfordshire) RadarGet WillyWeather+ to remove ads