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 yesterday at 3:41 pm. Next forecast at approx. 3:41 pm.Get an account to remove ads