Nantucket Harbor - First Point Rainfall ForecastUnited StatesMANantucket CountyNantucket Harbor - First PointToday 18 Apr5%Sat 19 Apr10%Sun 20 Apr15%Mon 21 Apr5%Tue 22 Apr40%Wed 23 Apr25%Thu 24 Apr10%Nantucket Harbor - First Point rainfall forecast issued today at 2:04 am. Next forecast at approx. 4:04 pm.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Boston RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads