Chatham Bar Swell ForecastUnited StatesMABarnstable CountyChatham Bar1-Day3-Day5-Day Graph Plots Open in Graphs Swell Height and Direction Forecast NOAA WaveWatch III Swell Period Forecast NOAA WaveWatch IIIChatham Bar swell forecast issued today at 1:47 am. Next forecast at approx. 1:47 am.Get WillyWeather+ to remove ads