Siltcoos River Mouth Swell ForecastUnited StatesORDouglas CountySiltcoos River Mouth1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIISiltcoos River Mouth swell forecast issued today at 4:49 am. Next forecast at approx. 4:49 am.Get WillyWeather+ to remove ads