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 10:46 pm. Next forecast at approx. 10:46 pm. Wave Height Sea TemperatureGet WillyWeather+ to remove ads