Nantucket County Swell ForecastUnited StatesMANantucket County4.9ftSSiasconset4.9ft, S4.3ftSSEGreat Point4.3ft, SSECisco BeachCoatueDionisEsther IslandGreat PointJetties BeachMiacomet BeachMuskeget IslandQuidnetSankaty Head LighthouseSiasconsetSquamSurfside NantucketTom NeversTuckernuck IslandWauwinet