Opihi Rock Rainfall ForecastUnited StatesHIHawaiiOpihi RockToday 19 Apr70%Sun 20 Apr80%Mon 21 Apr80%Tue 22 Apr50%Wed 23 Apr35%Thu 24 Apr30%Fri 25 Apr30%Opihi Rock rainfall forecast issued today at 1:04 pm. Next forecast at approx. 3:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time South Shore RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads