Twenty Foot Rock Swell ForecastAustraliaQLDNorthernTwenty Foot Rock1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIITwenty Foot Rock swell forecast issued today at 6:27 am. Next forecast at approx. 6:27 am.Get WillyWeather+ to remove ads