River Blackwater - Osea Island Rainfall ForecastUnited KingdomEEEssexRiver Blackwater - Osea IslandToday 19 Apr80%Sat 20 Apr10%Sun 21 Apr25%Mon 22 Apr40%Tue 23 Apr15%Wed 24 Apr25%Thu 25 Apr10%River Blackwater - Osea Island rainfall forecast issued today at 1:44 pm. Next forecast at approx. 3:44 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Thurnham (Kent) RadarNational SatelliteNational SynopticGet an account to remove ads