Seaside Grill

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.

πŸ‡ΊπŸ‡Έ We’re keeping the music going this Labor Day! 🎢🌊Join us at Seaside Grill as Ralph Telleli performs live by the water ...
09/03/2026

πŸ‡ΊπŸ‡Έ We’re keeping the music going this Labor Day! 🎢🌊

Join us at Seaside Grill as Ralph Telleli performs live by the water for a special Labor Day afternoon.

🎸 Ralph Tilleli Music
πŸ“… Labor Day β€” Monday, September 7
⏰ 4PM–7PM

One more reason to stretch the holiday weekend a little longer! Come enjoy great food, cold drinks, live music and a late-summer sunset overlooking the Peconic River. πŸŒ…πŸΉ

πŸ“ 451 East Main Street, Riverhead
🌊 Behind the Hyatt Place
πŸ“ž 631-574-0127

Keep the Labor Day Weekend going with The Libations at Seaside Grill! 🎢🍷🌊Spend your Sunday afternoon by the water enjoyi...
09/03/2026

Keep the Labor Day Weekend going with The Libations at Seaside Grill! 🎢🍷🌊

Spend your Sunday afternoon by the water enjoying acoustic covers, good vibes, great food and your favorite drinks.

🎡 The Libations
πŸ“… Sunday, September 6
⏰ 4PM–7PM

There aren’t many summer Sundays left β€” make this one count! β˜€οΈπŸΉ

πŸ“ 451 East Main Street, Riverhead
🌊 Behind the Hyatt Place
πŸ“ž 631-574-0127

Saturday night of Labor Day Weekend belongs to Rubber Soul! 🎸🎀Join Joe Salucci, Bob Meyers & Dee Meyers for an evening o...
09/03/2026

Saturday night of Labor Day Weekend belongs to Rubber Soul! 🎸🎀

Join Joe Salucci, Bob Meyers & Dee Meyers for an evening of live music by the water at Seaside Grill.

🎢 Rubber Soul Music
πŸ“… Saturday, September 5
⏰ 6PM–9PM

Come for dinner, stay for the music, and enjoy a Saturday night sunset on the Peconic River. πŸŒ…πŸΉ

πŸ“ 451 East Main Street, Riverhead
🌊 Behind the Hyatt Place
πŸ“ž 631-574-0127

Kick off Labor Day Weekend with the Kevin Lewis Duo at Seaside Grill! πŸŽΈπŸŒ…Join us Friday night for live music by the water...
09/03/2026

Kick off Labor Day Weekend with the Kevin Lewis Duo at Seaside Grill! πŸŽΈπŸŒ…

Join us Friday night for live music by the water, great food, cold drinks and a beautiful evening overlooking the Peconic River.

🎢 Kevin Lewis Duo
πŸ“… Friday, September 4
⏰ 6PM–9PM

Grab some friends and start the long weekend with us at Seaside Grill! 🍹🌊

πŸ“ 451 East Main Street, Riverhead
🌊 Behind the Hyatt Place
πŸ“ž 631-574-0127

Friday, August 28 β€” Rubber SoulKick off the weekend with Rubber Soul at Seaside Grill! πŸŽΆπŸŒ…Join us on the waterfront this ...
08/28/2026

Friday, August 28 β€” Rubber Soul

Kick off the weekend with Rubber Soul at Seaside Grill! πŸŽΆπŸŒ…

Join us on the waterfront this Friday for great music, cold drinks, delicious food, and a summer sunset on the Peconic River.

🎸 Rubber Soul
πŸ“… Friday, August 28
⏰ 6PM–9PM

Grab a table, order your favorite drink, and start the weekend at the Seaside! 🍹🌊

πŸ“ 451 East Main Street, Riverhead
πŸ“ž 631-574-0127

Sunday, August 30 β€” Kelli BakerThere’s no better way to close out the weekend than Sunday by the water with Kelli Baker!...
08/28/2026

Sunday, August 30 β€” Kelli Baker

There’s no better way to close out the weekend than Sunday by the water with Kelli Baker! 🎀🌊

Enjoy an afternoon of live music overlooking the Peconic River, along with great food, cold drinks, and that Seaside sunset.

🎢 Kelli Baker
πŸ“… Sunday, August 30
⏰ 4PM–7PM

Make the most of the final Sunday of August and spend it with us at Seaside Grill! β˜€οΈπŸΉπŸŽΆ

πŸ“ 451 East Main Street, Riverhead
πŸ“ž 631-574-0127

Saturday night calls for The Jam Club! 🎸🎢Spend the evening by the water with live music, good food, cold drinks, and one...
08/28/2026

Saturday night calls for The Jam Club! 🎸🎢

Spend the evening by the water with live music, good food, cold drinks, and one of the best views in Riverhead.

🎡 The Jam Club
πŸ“… Saturday, August 29
⏰ 6PM–9PM

Come hungry, bring some friends, and settle in for a summer Saturday night at Seaside Grill. πŸŒ…πŸ»

πŸ“ 451 East Main Street, Riverhead
πŸ“ž 631-574-0127

The rain doesn’t want to stop yet.We will be closed again tonight. Friday August 21st. πŸ˜­β˜”οΈ
08/21/2026

The rain doesn’t want to stop yet.
We will be closed again tonight. Friday August 21st. πŸ˜­β˜”οΈ

🎢 Another great weekend of live music at Seaside Grill! πŸŒ…πŸŽΈThree days, three great performances, and plenty of good food,...
08/20/2026

🎢 Another great weekend of live music at Seaside Grill! πŸŒ…πŸŽΈ

Three days, three great performances, and plenty of good food, cold drinks, and waterfront views. Grab some friends and spend the weekend with us at the Seaside! 🍹🌊

🎸 Friday, August 21 | 6–9PM β€” Lindsay Reeve Band
🎢 Saturday, August 22 | 6–9PM β€”North Fork Dirt Band
🎀 Sunday, August 23 | 4–7PM β€” DeeandBob

Come for dinner, stay for the music, and enjoy summer on the Peconic River!

πŸ“ 451 East Main Street, Riverhead
πŸ“ž 631-574-0127

Address

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

Opening Hours

Thursday 3pm - 9pm
Friday 3pm - 10pm
Saturday 12pm - 10pm
Sunday 12pm - 9pm

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