Diamond's Edge Restaurant & Marina

$3.50/ft -$4.47 per/ft

Not Offered

Day Trip
Great Diamond Island
Portland, ME 04109
Check-in after 01:00 PM
Check-out before 11:00 AM

Book faster with the free Dockwa app

31 Reviews

by Todd M. - Verified user on May 29, 2023
Excellent communication. Welcomed us at the slip.

by Thomas S. - Verified user on May 29, 2023
Great place for lunch, easy to docking

by Jameson S. - Verified user on May 28, 2023
Wonderful as always. It’s fitting that such a paradise of a cove has a marina managed by such a pleasant, consummate professional. Chris is one of the best among Casco Bay - and always makes a boat and her crew feel warm and welcomed. Diamond cove has been a regular haunt for me and my family over 25 years of boating / sailing. Chris (and the whole Diamonds Edge team) always ensures it will continue to be for 25 more. Cheers. The Smith Family // Luna II

by Patrick F. - Verified user on May 27, 2023
Great marina. Friendly staff!
Marina Response:
Thank you Pat. It's always nice to see you and your crew on the island.

by Andrew D. - Verified user on Oct 15, 2022
for the price you don't get very much
Marina Response:
Hello Andrew. As a seasonal tenant please feel free to communicate with our Dockmaster to address any needs of yours that are not being meet. Our seasonal contract with you should cover what is provided. Thank you

by Daniel W. - Verified user on Sep 24, 2022
The facility, the people, the beauty - all outstanding. Couldn't ask for anything better. Chris was outstanding and sooo helpful. Goes above and beyond to accommodate you....
Marina Response:
Great review. Thank you for taking the time to share your experience.

by David M. - Verified user on Sep 12, 2022
Nice place and a great dinner.
Marina Response:
We are very pleased that you enjoyed your visit. Thank you for the 5 star review.

by Jim S. - Verified user on Sep 11, 2022
great people, the island is beautiful, views amazing and its so peaceful .The Ferry or water taxi options are great for Portland.
Marina Response:
Thank you Jim for the positive review. It is always a pleasure having you visit Diamond Cove.

by Bruce T. - Verified user on Sep 05, 2022
The marina crew was very friendly and dinner was awesome.
Marina Response:
Our team takes great pleasure in receiving your positive review. Thank you for taking the time to let us know you enjoyed your visit.

by Barry C. - Verified user on Sep 01, 2022
Great marina and dock master is great!
Marina Response:
It is always a pleasure to receive positive reviews. Thank you.

by Marshall s. - Verified user on Aug 30, 2022
Great marina and location for visiting GDI. Chris the manager and all other staff were helpful and a pleasure to talk with. Can’t wait to go back.
Marina Response:
Our team is very pleased to hear you enjoyed your visit to Diamond Cove. Thank you for sharing your experience.

by David B. on Aug 19, 2022
Chris, the Dockmaster was very helpful and friendly. We ate at the Diamond's Edge Restaurant and the food and drinks were excellent. Very positive experience.
Marina Response:
Thank you very much for your positive review of our Marina and Restaurant.

by Warner H. - Verified user on Aug 07, 2022
The dockmaster, Chris, made us feel very welcome and his crew were very helpful. Great dining experience at the Crown Jewell nearby. Nice trails for walking.
Marina Response:
Thank you for your great review. We hope to see you again soon.

by Greg M. - Verified user on Aug 02, 2022
Great service at the marina and great service at the restaurant. The drinks were tasteless and the food was 3 stars at best. Next time we will bring food and grill on the boat.....

by Mark F. - Verified user on Jul 31, 2022
All around great place. People having fun.
Marina Response:
We are very glad you enjoyed your visit. Thank you for the positive review.

by J W. - Verified user on Jul 24, 2022
Actually, 4.5 stars. Lovely, lovely spot on this earth, like no other. Not 5 only because not well set up for the cruiser crowd....no W/D, showers a bit of a hike. Dockmaster Chris quite helpful and friendly, restaurant 4.7. Will definitely be back.
Marina Response:
We are pleased to hear you will be returning to Diamond Cove.

by Max R. on Jul 11, 2022
Diamond's Edge is an incredible stop. The island itself combined with the hospitality makes it a real gem and a stop we like to make at least once every year.
Marina Response:
Thank you so much for your 5 star review.

by David S. on Jun 27, 2022
Three friends and I dined at Diamond's Edge this past Friday night. The dockmaster was exceptionally helpful and friendly. The dining experience - on the lawn - was fantastic from start to finish. Highly recommend Diamond's Edge to all my friends.
Marina Response:
We are very pleased that you enjoyed your visit to Diamond's Edge. Thank you for the positive review.

by Buzz S. - Verified user on Jun 25, 2022
Chris on the dock was the best and more than helpful. Restaurant soo much better than last time which was before Covid. The walking map very helpful in understanding where the permitted places were to walk. Street names would be helpful on the map. The lady at the inn fixing our bagel breakfast could not have been nicer. She made our morning. Good job to all.
Marina Response:
We are so glad you enjoyed your visit to Diamond Cove. Our team truly appreciates your kind review.

by William M. - Verified user on Jun 08, 2022
As always, this is one of the most pleasant marinas to pull into. They're always waiting for you to arrive and ready to help you dock. And it's such a beautiful location with great food and fun beaches! Update: A year later, another visit, and another great experience. The marina manager always makes the process so easy, and it is such a great location.
Marina Response:
Thank you for a wonderful review of our Marina.

by Janice C. - Verified user on Jun 06, 2022
We love coming in to Diamond Island. It is one of our favorite trips. Chris, the Dockmaster, is always accommodating. It is always a great dining experience at the Inn restaurant, and enjoy the amenities at the hotel.
Marina Response:
We are very pleased that you enjoyed your stay in the Marina. We look forward to having you visit again soon.

by Melissa K. - Verified user on Sep 03, 2021
Amazing, secluded little spot. Food and drinks at Diamonds Edge restaurant are phenomenal. The dock master Chris is friendly, helpful and accommodating. The inn is beautiful and we’ll probably stay a night or two next year to break up a long boat vacation. My only complaint is there is limited hot water if someone is in both the men’s and women’s showers. You might end up running out so best to put some time between showers.
Marina Response:
Thank you for your 5 star review of Diamond's Edge Marina.

by Ted H. - Verified user on Aug 19, 2021
Great small marina with two good restaurants a short walk away. Note-No WIFI or cell service. Chris Johnson, the dock manager, is the best!!
Marina Response:
Our team appreciates your positive feedback. Thank you

by Wallace S. - Verified user on Aug 18, 2021
Chris and his team were very helpful/responsive in getting us situated on the island. Thanks for a great experience.
Marina Response:
Thank you so much for sharing your experience with other boaters. We strive for the highest level of hospitality.

by Sabine V. - Verified user on Aug 12, 2021
This location is absolutely beautiful. Small protected cove, very close to Portland. The amenities are limited...no wifi, spotty cell service, bathrooms are quite a long walk. The residents of the island do not want marina guests to walk around. You are required to request a golf cart ride up to the Inn to use the pool. Chris is a very pleasant and customer service oriented manager. He does a great job! Also, skip the Diamond's Edge restaurant and eat at Crown Jewel instead where the food outstanding!

by Paul V. - Verified user on Aug 08, 2021
Wonderful help on and off the dock.
Marina Response:
Thank you so much for your positive review. It's nice to hear that our efforts are appreciated. We hope to see you again in the Cove.

by Jeff O. - Verified user on Jul 24, 2021
Great stay and Chris the Dock Master was outstanding. Very accommodating and very customer focused.
Marina Response:
Jeff, it is always a pleasure having you and the whole family on the Island. Thank you for your kind review.

by Joseph K. - Verified user on Jul 19, 2021
Chris and John are excellent at their craft. Very helpful. Really enjoyed the comings and goings of the ferry.
Marina Response:
We are very glad you enjoyed your visit. Thank you for your review.

by Karen W. - Verified user on Jul 05, 2021
Diamond’s Edge Marina was amazing! Dockwa calculating the wrong dockage fee was our only issue.
Marina Response:
Thank you so much for your kind review. The Dockwa pricing issues, that under charged, have been corrected. We look forward to seeing you again soon.

by N. P. - Verified user on Jul 02, 2021
The dock manager was very helpful and friendly. They are a little short handed, but everything seemed to get done and I got all the help I needed.
Marina Response:
Thank you Chris. It is always a pleasure having you visit. We will look forward to more island stories on your next trip.

by Dwayne B. - Verified user on Jun 22, 2021
The dock master was rude and offensive. He asked us to tip the dock hand which we already had done. He then came to our table to confirmation our reservation which we did online. He again asked us to tip the dock hand. When we returned to our boat, he asked us again about tipping the dock hand. He was pleasant enough, but was extremely rude and intrusive by constantly chasing us down for the fee for stopping at the dock and tipping the dock hand. Unfortunately, I will not return there because of him. I guess the $250 lunch isn’t good enough.
Marina Response:
We sincerely apologize for any misunderstand during your recent visit. Recalling the conversation we feel it was misconstrued that we were seeking a gratuity, but rather the options available on Dockwa. We are committed to providing excellent service to all our guests, and we will review our communication guidelines with all staff members.

About Diamond's Edge Restaurant & Marina

Located at the northern end of Great Diamond Island, our 43 slip deep-water marina can accommodate vessels up to 110+ ft. Our private marina is available exclusively for guests at Diamond's Edge Restaurant, the Inn at the Diamond Cove, and all overnight boaters.

Visit the island to explore and take in 193 acres of spectacular natural landscape that inspires outdoor recreation and relaxation. The island is home to Diamond Cove, a small residential community that was a former military base built during America's Gilded age, the luxurious Inn at Diamond Cove, the highly-rated Diamond Edge Restaurant, and the Fort McKinley Museum.

All slip reservations include complimentary water and Wi-Fi, and access to shower and bathroom facilities. Please hail us on VHF channel 09 as you enter the harbor and we'll happily guide you to your slip. All dockage reservations will be processed through Dockwa.

We invite boaters to dock and dine at our newly renovated Diamond's Edge Restaurant featuring fresh, local New England favorites.

If arriving by boat to dine at the restaurant, please book online via Dockwa and make note of your reservation time during checkout.

Booking Info

  • 36 foot pricing minimum on all reservations
  • Max LOA 109 feet

Please make sure to update your vessel info - please round up to the nearest foot to avoid errors during the booking process

Day Trips

Please be sure to message us to specify if you are restaurant guest, and what time you will be arriving for your reservation.

  • Restaurant Guest (2-4 hours): $10
  • Resident Guest (4-6 hours): $45
  • Contractors (8 hours): $100

Overnight Transient Guests

  • Up to 42': $3.50/ft/night
  • 43'-55': $4.00/ft/night
  • 56'-70': $4.25/ft/night
  • 71'-90': $4.50/ft/night
  • 91'-109': $4.75/ft/night


  • Water
  • Electrical


  • Launch Service
  • Restrooms
  • Showers
  • Ice
  • Security
  • Swimming Pool
  • Groceries
  • Hotel/Lodging
  • Restaurant
  • Floating Docks
  • Pet Friendly



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