Black Rock Rainfall ForecastUnited KingdomSWCornwallBlack RockToday 23 Mar10%Tue 24 Mar90%Wed 25 Mar65%Thu 26 Mar50%Fri 27 Mar55%Sat 28 Mar15%Sun 29 Mar15%Black Rock rainfall forecast issued today at 6:36 am. Next forecast at approx. 8:36 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Predannack (Cornwall) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads