Granite Island Swell ForecastUnited StatesAKKenai Peninsula BoroughGranite Island1-Day3-Day5-Day Graph Plots Open in GraphsSwell Height and Direction Forecast NOAA WaveWatch IIISwell Period Forecast NOAA WaveWatch IIIGranite Island swell forecast issued yesterday at 9:13 pm. Next forecast at approx. 9:13 pm.Get an account to remove ads