Sand Knoll Ledge Swell ForecastAustraliaWAWheatbeltSand Knoll Ledge1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIISand Knoll Ledge swell forecast issued today at 3:58 am. Next forecast at approx. 3:58 am. Wave Height Sea TemperatureGet WillyWeather+ to remove ads