Copalis River Mouth Swell ForecastUnited StatesWAGrays Harbor CountyCopalis River Mouth1-Day3-Day5-Day Graph Plots Open in GraphsSwell Height and Direction Forecast NOAA WaveWatch IIISwell Period Forecast NOAA WaveWatch IIICopalis River Mouth swell forecast issued today at 4:13 am. Next forecast at approx. 4:13 am.Get an account to remove ads