Onkaparinga River Entrance Swell ForecastAustraliaSAAdelaideOnkaparinga River Entrance1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIOnkaparinga River Entrance swell forecast issued today at 12:47 pm. Next forecast at approx. 12:47 pm.Get WillyWeather+ to remove ads