Granite Island Swell ForecastUnited StatesAKKenai Peninsula BoroughGranite Island1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIGranite Island swell forecast issued today at 1:40 am. Next forecast at approx. 1:40 am.Get an account to remove ads