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625 North Rd, Groton, CT 06340-3212
+1 860-326-0360
07:00 - 23:00
Closed now
See all hours
Sun - Thu 06:00 - 22:00
Fri - Sat 07:00 - 23:00
More Info
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245 Reviews from our TripAdvisor Community

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Showing 242: English reviews
New England
Level Contributor
13 reviews
5 restaurant reviews
common_n_restaurant_reviews_1bd8 6 helpful votes
Reviewed 3 weeks ago

At the risk of sounding like a travel snob, hotel based restaurants are not usually my first choice. But the menu, price, service and quality were outstanding and what a nice "commute" back to the room! Our server said locals make the trip just eat at Octagon.

Thank JollyKO
New London, Connecticut
Level Contributor
20 reviews
16 restaurant reviews
common_n_restaurant_reviews_1bd8 2 helpful votes
Reviewed 4 weeks ago

I was here for some drinks after work with a few co-workers. The bartenders are awesome here. They are so attentive to their patrons. I ended up getting a snack before dinner and had the lobster bisque at that time. It was PURE yum. I hated when restaurants serve lobster bisque and the lobster meat is all ground up or... More 

Thank Pho N
Groton, Connecticut, United States
Level Contributor
34 reviews
30 restaurant reviews
common_n_restaurant_reviews_1bd8 8 helpful votes
Reviewed 11 April 2017

5-star restaurant indeed top notch food and service, waiters very helpful about ingredients in all foods and wine list. atmosphere very romantic great seen. All was excellently prepared and served one beast restaurants in New England hands down very well run front and back of house

1 Thank Brian L
Ledyard, Connecticut
Level Contributor
3 reviews
3 restaurant reviews
Reviewed 5 April 2017

Wonderful restaurant in all respects!! A tad pricey, but you really get what you pay for. Courteous staff. Timely meal service. Had their salmon dinner from the regular menu. Wonderful. Grilled vegetables were extremely tasty. Looking forward to returning. The small room off the main dinning room provided a quiet private dinning area for our party of thirteen.

Thank 468keith
Waterford, Michigan
Level Contributor
43 reviews
27 restaurant reviews
common_n_restaurant_reviews_1bd8 18 helpful votes
Reviewed 30 March 2017 via mobile

Located inside the Mystic Marriott in Groton Connecticut, this in house diner is suited to meet the needs of any traveling patron. For those with a more refined palate, their steaks feature top quality Kobe beef and fillets that will melt in your mouth. The heavy selection of appetizers, salads and starters will have you mooing out of there if... More 

Thank ReflectiveEscapes
Boston, Massachusetts
Level Contributor
76 reviews
51 restaurant reviews
common_n_restaurant_reviews_1bd8 33 helpful votes
Reviewed 15 March 2017

This restaurant is located inside the Marriott Hotel & Spa. We ate here three times over the weekend. Why did we eat here 3 times when the service was terrible??? We were at the hotel for a 3-day event and this is the only restaurant at the hotel. There is a Starbucks for quick service food items. The first meal... More 

1 Thank DonnaZJ
Groton, Connecticut
Level Contributor
192 reviews
93 restaurant reviews
common_n_restaurant_reviews_1bd8 57 helpful votes
Reviewed 14 March 2017

A private b-day party in the "smoke room" was incredibly wonderful! Smoke room is NOT a smoking atmosphere but a non-see-through smoky glass. We were a party of 13 with appetizers, beverages and a choice of pre-fixe menu options. All entrees were delicious. The birthday cake was not from The Octagon but our efficient and very friendly server, Erin, brought... More 

Thank carole c
Level Contributor
10 reviews
5 restaurant reviews
common_n_restaurant_reviews_1bd8 2 helpful votes
Reviewed 14 March 2017

My wife and I had a wonderful experience at this restaurant during our recent visit to Mystic. The wait staff were just terrific and took wonderful care of us. I especially enjoyed the French Onion Soup, it was one of the best I've had. My steak was also wonderful. I would definitely come back here again.

Thank Albert M
Bristol, Connecticut
Level Contributor
6 reviews
4 restaurant reviews
Reviewed 14 March 2017 via mobile

I have eaten here a number of times during my stay at the Marriott. The food is good. It can get very crowded, particularly if the hotel is busy. Staff is attentive. Breakfast buffet is very good - lots of choices!!!

Thank Nancy J
North of Boston
Level Contributor
359 reviews
222 restaurant reviews
common_n_restaurant_reviews_1bd8 140 helpful votes
Reviewed 27 February 2017

Went for late dinner on Saturday night. Sat in the bar area. Service was a bit slow, bartender responsible for high tops and seemed to get pre occupied with the people sitting at the bar. Unfortunately it meant list of wait time. Olive pirate not worth it. You'll get five cubes of cheese, two rolls and a few olives. Presentation... More 

Thank votenochains

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Restaurant Details

Rating summary
  • Food
  • Value
Average prices
US$50 - US$70
American, Seafood, Healthy, Vegetarian Friendly, Gluten Free Options
Brunch, Breakfast, Lunch, Dinner, After-hours
Restaurant features
Reservations, Seating, Waitstaff, Parking Available, Highchairs Available, Wheelchair Accessible, Serves Alcohol, Full Bar, Private Dining, Free Wifi
Dining Style
Casual Dining
Good for
Business meetings, Special Occasion Dining, Groups, Romantic, Bar Scene, Local cuisine, Child-friendly
Open Hours
06:00 - 22:00
06:00 - 22:00
06:00 - 22:00
06:00 - 22:00
06:00 - 22:00
07:00 - 23:00
07:00 - 23:00
Location and Contact Information
  • Address: 625 North Rd, Groton, CT 06340-3212
  • Location: United States  >  Connecticut (CT)  >  Groton
  • Phone Number: +1 860-326-0360
Located just outside Mystic, CT, Octagon prides itself on offering the finest steaks and freshest seafood everyday. Our menu changes seasonally and celebrates local ingredients harvested right here in our beautiful state of Connecticut. To our pleasure, our guests are travelers from around the globe and neighborhood locals. From our open grill and wine cellar to our one of a kind artwork and glass sculptures, we truly believe dining should be an experience, not just a meal.

Questions & Answers

Questions? Get answers from Octagon staff and past visitors.
Posting guidelines
Typical questions asked:
  • Do you have gluten-free options?
  • Is there a dress code?
  • Do you allow dogs on the outdoor patio?