Waipio Bay Rainfall ForecastUnited StatesHIHawaiiWaipio BayToday 19 Apr75%Sun 20 Apr80%Mon 21 Apr75%Tue 22 Apr65%Wed 23 Apr40%Thu 24 Apr35%Fri 25 Apr25%Waipio Bay rainfall forecast issued today at 12:04 pm. Next forecast at approx. 2:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Kohala RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads