Copalis River Mouth Swell ForecastUnited StatesWAGrays Harbor CountyCopalis River Mouth1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIICopalis River Mouth swell forecast issued today at 3:42 pm. Next forecast at approx. 2:42 pm.Get an account to remove ads