Sydenham Rainfall ForecastUnited KingdomNIBelfastSydenhamToday 20 May10%Wed 21 MayNo RainThu 22 MayNo RainFri 23 May55%Sat 24 May65%Sun 25 May60%Mon 26 May65%Sydenham rainfall forecast issued today at 7:37 pm. Next forecast at approx. 9:37 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Castor Bay (Lurgan) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads