Seaside Grill

Waterfront marina bar and restaurant located on the beautiful Peconic River, right behind the Hyatt East End Live music is available on weekends.
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The main waterfront restaurant & boat bar are closed for the 2024 season! Sipping margaritas by a on a sunny day right on the water…what could be better during the summer on Long Island? The Seaside Grill, located adjacent to the Hyatt Place East End & Resort Marina, 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 b

oats dotting the shore at Treasure Cove Resort Marina, patrons can enjoy brunch, lunch & dinner while sipping a cool drink either poolside or at our waterfront dining area. Choose from an assortment of specialty cocktails, including rum runners, daiquiris, or our signature Seaside Sangria, or enjoy something from the kitchen, including calamari, local oysters, shrimp tacos, and more! Pool access is restricted to hotel and overnight marina guests. Pool hours vary according to season. Location: Behind the Hyatt Place East End inside of Treasure Cove Resort Marina. Attire: Casual

The hotel, located at 451 East Main Street in Riverhead, NY, consists of 100 rooms and suites and is adjacent to Long Island Aquarium & Exhibition Center and Atlantis Banquets & Events, home of the brand-new Sea Star Ballroom. The property boasts 11 meeting spaces, with 17,000 square feet of indoor and outdoor meeting, conference, banquet, and event spaces.

05/27/2026

Come enjoy our lineup this weekend at Seaside!
Thursday 5/28 Karaoke Kickoff 6-9 with
Friday 5/29 6-9
Saturday 5/30 6-9
Sunday 5/31 Live music 4-7

05/20/2026

Come celebrate the holiday weekend with us!
Friday May 22nd:White Room Band 6-9
Saturday May 23rd: Kevin Lewis Duo 6-9
Sunday May 24th: Trio 4-7
Monday May 25th: Rick Reyes 4-7

05/14/2026

We’re back and the weather is looking good this weekend! Let’s kick this outdoor season off!
Weekend Music Lineup!
Friday May 15th: 6pm-9pm
Saturday May 16th: Lindsay Reeves Band 6pm-9pm LINDSAY REEVE BAND
Sunday May 17th: 4pm-7pm

05/10/2026

05/02/2026

Tough decision but we have to postpone our opening day due to weather.

04/23/2026

Run, don’t waddle to Seaside Grill for opening day of the 2026 season! Happy hour specials all day Saturday May 2nd, live music by from 4pm to 7pm!!!

04/07/2026

10/20/2025

Another summer has come and gone and the 2025 season has officially come to a close. Burn Out The Bar was a blast, thank you to for rockin the docks while we burned out the bar! Thank you to all of guests, musicians and employees for making a memorable 2025 at the Seaside Grill!
See you all in May of 2026!

10/08/2025

It’s been a great 2025 season at ! Just 2 more weekends to rock the docks with us and our musicians!
Friday 10/10: Kevin Lewis 6pm-9pm
Saturday 10/11: 4pm-7pm
Sunday 10/12: Mike Kelly Acoustic 4pm-7pm

10/03/2025

This weekends specials!
Truffle and wild mushroom flatbread 🍕 swizzled Alcohol infused desserts: Spice Island Vanilla Ice Cream and Pineapple-Mango Chill Sorbet!

Address

451 East Main Street (Behind Hyatt Place East End & Resort Marina)
Riverhead, NY
11901

Website

http://www.seaside-grill.com/

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