Saint Helena Sound Swell ForecastUnited StatesSCColleton CountySaint Helena Sound1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIISaint Helena Sound swell forecast issued yesterday at 7:48 pm. Next forecast at approx. 7:48 pm.Get an account to remove ads