Long Island Rainfall ForecastUnited KingdomSWCornwallLong IslandToday 24 Jul5%Sat 25 Jul85%Sun 26 Jul70%Mon 27 Jul10%Tue 28 Jul10%Wed 29 Jul10%1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast Met Office Rain Today Real-Time Long Island rainfall forecast issued today at 12:11 am. Next forecast at approx. . Rainfall Rainfall AccumulationPredannack (Cornwall) RadarGet WillyWeather+ to remove ads