Please note that this is a lock-protected facility. The max beam that can fit through the lock is 19.5. Windmill Harbour Marina is situated on the northwest coast of Hilton Head Island, South Carolina. The marina is 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. One of only three private locked harbours' on the east coast, Windmill Harbour Marina offers an unparalleled combination of convenience, luxury and security for boaters. Boaters visiting Windmill Harbour Marina will enjoy its resort-like setting near great destinations, including Savannah and Beaufort. Those who want to stay and play at the marina will have access to the facilities at the South Carolina Yacht Club on-site, which includes a restaurant, pool, sauna, hot tub, tennis courts and bar. There is also a provisions store on-site and high-speed fueling.