With depths from 0.6 to 3.4 meters (2 to 11 feet), Lewis Bay eastward from Hyannis Harbor. A channel in the northwest corner of Lewis Bay goes to Hyannis Harbor's summer resort.
With breakwater protection, Hyannis Harbor is a harbor of refuge for vessels traveling the coast and recreational vessels of less than 4.3-meter (14 foot) draft. When boaters approach the harbor, they will see the day-beacon on Great Rock, a light at the end of the breakwater, the abandoned lighthouse on Point Gammon, and a stone church belfry that overlooks Hyannisport.
The approach channel has depths varying from 4 to 4.9 meters (13 to 16 feet). However, flats extend to the west from Point Gammon, and a rocky shoal extends southeast from Hyannisport. The protected basin north of the breakwater light offered depths of 2.1 to 4.6 meters (7 to 15 feet) in January 2007.
Vessels can anchor inside the Hyannis Harbor breakwater at the east side of the mooring area where the depths range from 4.6 to 6.1 meters (15 to 20 feet). Small craft can anchor in the Hyannis Harbor's north section where the depths are 1.2 to 2.4 meters (4 to 8 feet). However, a submerged wreck in that area that is marked by a buoy is a hazard for the inattentive boater.
A privately-dredged channel with a depth of about 1.8 meters (6 feet) leads to the west shore of Hyannis Harbor and the Hyannis Port Yacht Club. The Yacht Club on the western shores of Hyannis Harbor can support vessels up to 42.7 meters (140 feet), and it offers alongside depth of 2.4 meters (8 feet).
A dredged channel leads into Lewis Bay from Hyannis Harbor and then to an anchorage basin to the north of Harbor Bluff and to the Hyannis Harbor town wharf at the western end. Although the Hyannis Harbor channel is well marked, it is subject to shoaling near Approach Channel Buoy 9 in Lewis Bay. Vessels must be careful to follow the marked channel when approaching Hyannis Harbor.
There are several launching ramps and facilities for small craft north of Harbor Bluff. The town marina offers limited berths, and a dockmaster is usually on duty at the marina. Information on berthings and moorings is available through the harbormaster, the Barnstable police department, and VHF-FM channels 9 and 16. Ferries traveling to the islands of Martha's Vineyard and Nantucket Berth in Hyannis Harbor, and the Barnstable Municipal Airport is located just north of town.
Located at one of the few natural deep-water harbors on Cape Cod, Hyannis Harbor has a resort marina that can accommodate everything from day sailors to deep-draft super yachts. Hyannis Harbor is home port to a commercial fishing fleet, charter fishing boats, ferryboats, sightseeing boats, yachts, and sail boats.
Hyannis Harbor Marina is a full-service marina offering a discount marina store, full service and repair facilities, and hauling services for vessels to 50 tons. Visitors to the Hyannis Harbor Marina will find showers, courtesy cars and rental cars, high-speed refueling, laundry, cable TV, wireless high-speed Internet, and ice.
Tugboats, a popular local restaurant, is located on the Marina site, and it has some of the best views of Hyannis Harbor. There is also a private swimming pool on-site at Hyannis Harbor Marina that is accompanied by Trader Ed's Cabana Bar. Vessels can tie up at the Hyannis Harbor Marina to visit local restaurants and clubs.
The Service Department in Hyannis Harbor offers repair services for engines and vessel systems, diesel engines, and fiberglass, wood, and paint. It offers hauling, storing, and launching for boats up to 50 tons as well as winter storage.