Johnson Creek Mouth Swell ForecastUnited StatesCAHumboldt CountyJohnson Creek Mouth1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIJohnson Creek Mouth swell forecast issued yesterday at 10:47 pm. Next forecast at approx. 10:47 pm.Get an account to remove ads