River Blackwater - Osea Island Rainfall ForecastUnited KingdomEEEssexRiver Blackwater - Osea IslandToday 1 Nov55%Mon 2 Nov30%Tue 3 Nov40%Wed 4 Nov10%Thu 5 Nov10%Fri 6 Nov10%Sat 7 Nov5%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time River Blackwater - Osea Island rainfall forecast issued today at 6:10 am. Next forecast at approx. 8:10 pm. Rainfall Rainfall AccumulationThurnham (Kent) RadarGet WillyWeather+ to remove ads