Black Rock Rainfall ForecastUnited KingdomSWCornwallBlack RockToday 18 Sep10%Fri 19 Sep45%Sat 20 Sep85%Sun 21 Sep45%Mon 22 Sep40%Tue 23 Sep10%Black Rock rainfall forecast issued yesterday 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 Predannack (Cornwall) RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads