East Hampton Three Mile Harbor Marinas

Discover East Hampton’s Premier Boating Destinations: Transient Dockage at Halsey’s, Gardiner’s, Three Mile Harbor, and Harbor Marina

Seacoast Enterprises Associates is a family business that owns and operates four marinas and the only 7 transient moorings in Long Island's East Hampton Three Mile Harbor. Of the four marinas: Harbor Marina, Halsey’s Marina, Gardiner’s Marina, and Three Mile Harbor Marina, each location provides a different set of amenities and experiences. The East Hampton and Amagansett villages are a short car ride away, home to renowned beaches and restaurants. All marina locations have trained staff on-hand ready to assist boaters, provide access to electric and water hookups, and free WiFi.

Harbor Marina is the first marina at the entrance of Three Mile Harbor. The marina’s waterside restaurant "Bostwick's On The Harbor" provides a lovely sunset dining experience. Harbor Marina is a full service marina with floating docks, dry rack, and a fuel dock that sells ValvTect branded gasoline and diesel. There is a ship’s store on location that offers a wide variety of goods, from tackle and bait to gifts and ice cream.

Halsey’s Marina is located in the southern half of the harbor. The marina has fixed docks, a quaint clubhouse with bathrooms, showers, and laundry, and a picnic area with grills. The basin is surrounded by nature preserves on three sides and affords peaceful natural views. The quiet and private atmosphere of Halsey’s Marina resembles a picturesque yacht club setting.

Gardiner’s Marina is located in the southern half of the harbor. The marina basin is newly-renovated, creating a larger space for more comfortable maneuvering into and out of slips. Gardiner’s Marina has bulkhead slips with floating finger piers, a modest clubhouse with bathrooms, showers, and laundry, a picnic area with grills, and allows for parking behind your boat. The marina’s close proximity on the west side to preserved wetlands offers uniquely beautiful views of the local environment.

Three Mile Harbor Marina is a full service marina and boatyard located in the southern end of Three Mile Harbor. Three Mile Harbor Marina provides slips in season, and year-round vessel storage and certified service for Mercury, Volvo Penta, Yamaha, and more. The marina has floating docks, a handicap-accessible clubhouse with bathrooms, showers, laundry, and grills. There is a ship’s store on location with an array of boating necessities including ice, snacks, bait, engine parts, and more.

The 7 transient moorings are 500lbs mushroom anchors located in the main deepwater mooring field of Three Mile Harbor. A stay on the transient moorings includes complimentary access to the dinghy dock and clubhouse at Three Mile Harbor Marina. The protected harbor provides calm waters, a dedicated watersports area, and lots of fellow boaters enjoying the Hamptons atmosphere. Please be aware that there is no launch service in Three Mile Harbor and it is a no-discharge zone.

Transient boaters are received in season between the operating hours of 8:00 am and 4:00 pm, 7 days a week. Check-out time is 11:00 am, check-in time is 1:00 pm.