Honolulu Harbor Rainfall ForecastUnited StatesHIHonoluluHonolulu HarborToday 18 Apr55%Sat 19 Apr45%Sun 20 Apr45%Mon 21 Apr40%Tue 22 Apr75%Wed 23 Apr75%Thu 24 Apr75%Honolulu Harbor rainfall forecast issued today at 3:05 pm. Next forecast at approx. 5:05 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time Molokai RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads