Harvey River Diversion Drain Entrance Swell ForecastAustraliaWASouth WestHarvey River Diversion Drain Entrance1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIHarvey River Diversion Drain Entrance swell forecast issued yesterday at 9:59 pm. Next forecast at approx. 9:59 pm.Get WillyWeather+ to remove ads