Seabrook Dunes and Beach Swell ForecastUnited StatesNHRockingham CountySeabrook Dunes and Beach1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIISeabrook Dunes and Beach swell forecast issued today at 1:46 am. Next forecast at approx. 1:46 am.Get WillyWeather+ to remove ads