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 yesterday at 7:47 pm. Next forecast at approx. 7:47 pm. Wave Height Sea TemperatureGet WillyWeather+ to remove ads