Niantic Bay Boathouse Marina is located at the entrance of the Niantic River to Long Island Sound. It enjoys a competitive advantage as the closest marina to the open water of Long Island Sound - which is favored by fishermen. Superb angling awaits these avid sportsmen. For the Cruisers, the waters of Long Island Sound offer many interesting near-by ports-of-call including: Fisher's Island, Montauk and Sag Harbor on Long Island and Block Island.