Portsmouth Island Swell ForecastUnited StatesNCCarteret CountyPortsmouth Island1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIPortsmouth Island swell forecast issued today at 12:47 pm. Next forecast at approx. 12:47 pm.Get WillyWeather+ to remove ads