Mad River Beach Swell ForecastUnited StatesCAHumboldt CountyMad River Beach1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIMad River Beach swell forecast issued yesterday at 10:49 pm. Next forecast at approx. 10:49 pm.Get WillyWeather+ to remove ads