Welcome to Windmill Harbour Marina, situated on the northwest coast of Hilton Head Island, South Carolina. We are located on the Intracoastal Waterway, just ½ mile south of the Pinckney Island Bridge at mile marker 558, 500 yards south of channel marker 27, and ½ mile north of channel marker 29 in the Calibogue Sound. The marina’s 15.5 acre harbour boasts 258 Hilton Head boat slips, offering many for rent or sale. Transient dockage is available. Our remarkable harbour offers a safe, tide free haven protected by a lock system directly off the Intracoastal Waterway.