Nantucket County Swell ForecastUnited StatesMANantucket County3.6ftSWSiasconset3.6ft, SW3.3ftSWGreat Point3.3ft, SWCisco BeachCoatueDionisEsther IslandGreat PointJetties BeachMiacomet BeachMuskeget IslandQuidnetSankaty Head LighthouseSiasconsetSquamSurfside NantucketTom NeversTuckernuck IslandWauwinet