Sipping margaritas by a sparkling pool on a sunny day next to the water…what could be better during the summer on Long Island? The Seaside Grill, located adjacent to the Hyatt Place Long Island/East End, is the newest seasonal hot spot to hit Long Island’s East End. With views of the lush scenery of the Peconic River, along with the boats dotting the shore at Treasure Cove Resort Marina, patrons can enjoy lunch or sip a cool drink under spa blue umbrellas. Courtesy delivery to Hyatt Place and Treasure Cove Marina Guests!


Pool Bar: Opens for the Season on Friday, July 1st 11AM-5PM opened daily

Boat Bar and Restaurant:
Thursday Evenings: 4-10PM
$40 Lobster Bake every Thursday
Every other Thursday is Trivia 6-9PM
Every other Thursday alternating is Karaoke 6-9PM

Friday Evenings: 4-11PM
Live Music 6-9

Saturday 11AM-11PM
Live Music 6-9PM
Brunch menu 11-2PM

Sundays 11AM-8PM
Live Music 4-7PM
Brunch menu 11-2PM

Burn out the Bar event on Saturday, October 16th (rain date October 17th)
Live Music starts at 1PM
Half off all Drinks and Food

Weather Permitting
Seasonal location


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Sean Fountaine

Executive Chef


Executive Chef Sean Fountaine has been bestowing his culinary skills to our guests since the opening of Atlantis Banquets & Events in 2000. As a graduate of the renowned Johnson and Wales University, he began his career at several critically acclaimed restaurants in Nantucket, Palm Beach, New Orleans and Memphis before launching his own restaurant in Hampton Bays. In 2005 he earned the Certified Executive Chef Status from the American Culinary Federation. In addition to his work with us, he is also an adjunct professor at Suffolk County Community College in the Culinary Arts Department, specializing in food safety and international cuisine. In 2010 he participated in the EUHOFA International Congress at Johnson and Wales University. Most recently, Chef Fountaine was elected Secretary of the Eastern Long Island Chapter of the American Culinary Federation.