Opening Day for the 2017 – Boating and Sailing Season

Seacoast Enterprises Associates Marina Properties Grand Opening - 2017 Season 423 Three Mile Harbor / HC Road, East Hampton, NY, NY, United States

Join Seacoast Enterprises for the Official Opening of the 2017 Boating Season. Store Specials at the Harbor Marina and Three Mile Harbor Marina Ships Stores. Free soft Drinks for all Store Customers on May 12th Meet your Dockmasters from 11am to 12am at the Harbor Marina Ships Store and learn about Marina Operations, Local Activities, […]


Great Peconic Race (Spring Fling) – Charity Paddleboard Race

Gardiner's Marina Three Mile Harbor Road, East Hampton, NY, United States

Charity Paddleboard Race on Beautiful Three Mile Harbor, benefitting the Cornell Cooperative Marine Extension - Back to the Bays Program. June 3rd at Gardiner's Marina on Three Mile Harbor Road, East Hampton, NY 11937. 3pm Registration, 4pm Start. We will be running a 3 mile and a 6 mile Course, Stand Up Paddle, Kayaks, Prone […]


US Coast Guard Auxiliary – Boating Safety Course

Sign up for a comprehensive Boating Safety Course with Certification held on June 10th. Topics Covered: Intro to Boating Boating Law Boat Safety Equipment Safe Boating Navigation Boating Problems Trailering, Storing and Protecting your Boat Sailing, WaterSports, Fishing and Related Activities This is an 8 hour course and you will be issued a USCG certified […]


Lighthouses and Ruins – Landmarks Scavenger Hunt

Harbor Marina 423 Three Mile Harbor Road, East Hampton, NY, United States

Explore "Bug Light" (Greenport), "The Spark Plug" (Orient), Cedar Point (NW Harbor), and the Gardiner's Island Ruins. A fun day on the water with family and friends. Special Prizes for the first boats around "The Horn" to all locations and back to the Harbor Marina Fuel Dock to check in and verify your findings. Please […]


SEA @ The NY Boat Show

Please stop by and Visit the SEA Team at the NY Boat Show. The show provides a wealth of information about the boating industry and a look ahead into the 2018 boating season. We will be at Booth #452. Adults: $16 Kids 13 and Under: Free


Transient Dockage Reservations Open as of March 1st 2018

Use our Dockwa System to book your 2018 Transient Dockage or Mooring Reservation. The traditional Boating season on Three Mile Harbor Runs from May 1st through October 31st. We look forward to seeing you this year.

Boaters Safety Course

Breakwater Yacht Club

The U.S. Coast Guard Auxiliar Flotilla 014-18-02 will offer a boating safety course on March 3rd at the Breakwater Yacht Club in Sag Harbor. Course Topics include as introduction to boating, boating law, navigation and New York State requirements. The course fullfills the requirements to operate a personal watercraft. The cost of the course is […]


Opening Day

Seacoast Enterprises Associates (SEA) is proud to announce the opening of the 2018 Boating Season on May 12th. All properties are fully staffed and will be open 7 days a week from 8:30am to 5pm. Please call our main offices at 631.324.5666 with any questions. Happy Boating from the SEA Team.