Allen Harbor Breakwater Light Swell ForecastUnited StatesMABarnstable CountyAllen Harbor Breakwater Light1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIAllen Harbor Breakwater Light swell forecast issued today at 7:44 am. Next forecast at approx. 7:44 am.Get WillyWeather+ to remove ads