Brother Islands Rainfall ForecastUnited StatesAKLake and Peninsula BoroughBrother IslandsToday 19 Apr100%Sun 20 Apr90%Mon 21 Apr75%Tue 22 Apr85%Wed 23 Apr65%Thu 24 Apr35%Fri 25 Apr75%Brother Islands rainfall forecast issued today at 3:04 pm. Next forecast at approx. 5:04 am.1-Day3-Day5-Day Graph Plots Open in Graphs Rainfall Probability Forecast NOAA Rain Today Real-Time King Salmon RadarNational SatelliteNational SynopticGet WillyWeather+ to remove ads