Diamond's Edge Restaurant & Marina

$3.50/ft -$4.47 per/ft

Not Offered

Day Trip
$10 - $80
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

85 Reviews

by Tom S. - Verified user on Jun 03, 2024
Quick stop for lunch. Good communications and line handling help from dock staff, food was great, view was unbeatable. Highly recommended.

by Daniel B. - Verified user on Oct 15, 2023
The marina is in great condition. We are always treated warmly at both the marina and the restaurant. Food is consistently excellent. Dan and Jane

by D P. - Verified user on Oct 15, 2023
Bad. Dock was not stable, screws proud of boards. Failed even to have the courtesy of responding to a refund request that the dock master encouraged me to make.

by Santo S. - Verified user on Oct 15, 2023
Docking at Diamond Cove was great. Chris, the dock master, was always helpful.

by richard p. - Verified user on Oct 02, 2023
The restaurant was great. The Dockwa app we had to use as a private boat owner was cumbersome and confusing. We were told at the restaurant that we could get the dock fee refunded since we ate at the restaurant. When we contacted Dockwa we were very rudely told that they never give free dock space and no one at the restaurant would ever tell a diner that they would. It was an unnecessarily negative interaction. Obviously we had been given incorrect information. It could have been relayed to us much more positively. Very unprofessional. Our meal at the restaurant was lovely
Marina Response:
Hi Richard. We do not allow any vessels to dock for free. You requested, and were approved for a 2 night stay in the marina. You accepted the charges associated with a 2 night stay. We are not sure where you heard that dining in our restaurant would allow free overnight dockage, but this has never been, and will never be, our policy. Most of our guests appreciate the ease of using the Dockwa App. We are not sure why you had difficulties, but feel free to share your confusion so that we can address any issues with the App. We are glad you enjoyed the restaurant, and your 2 night stay on the island.

by Preston D. - Verified user on Sep 24, 2023
The Marina wasn’t very busy but they were courteous in directing us to the slip

by CJ N. - Verified user on Sep 10, 2023
Very friendly and accommodating! Dockwa made it very way to reserve and the marina was great!

by Marc M. - Verified user on Sep 05, 2023
Always friendly and helpful

by Holly D. - Verified user on Sep 03, 2023
The view was beautiful and we had some help getting into our slip. If you have a dog, it is a walk to get to a grassy area. The marina has shower and bathroom facilities but they are also a considerable walk and when a wedding is taking place, you will not have a private space as the shower is clear glass and out in the open area of the shared bathroom. So while it is an absolutely beautiful location, it’s services that it lists are not easy to access. I highly recommend eating at the Crown Jewel. Amazing food!

by Kenneth G. - Verified user on Sep 03, 2023
Dockmaster Chris is an awesome guy. Super helpful.

by Robert K. - Verified user on Aug 31, 2023
Chris was, as usual, helpful and engaging even though we arrived with other boats needing assistance with tie-ups.

by Paul S. - Verified user on Aug 28, 2023
Great location and setting , great restaurant service, fantastic dockage service, really nice slip. The only negative was the food for the price was a C-.

by Jameson S. - Verified user on Aug 28, 2023
Just recently visited to celebrate my mothers 70th birthday. From start to finish - as always - the experience was fantastic. Chris the marina manager started us off with a warm welcome to our slip - and the restaurant manager (who I failed to get the name of but wish I had) and the entire restaurant team went out of their way to ensure we had the exact table and setting on the lawn that we wanted. Everyone bent over backwards to ensure the celebration was perfect. And it was. I’ve written positive reviews before - and know I will continue to do so in the future. To anyone reading this and wondering - whether it’s a short stay, or an extended one - Diamond Cove might just be one of the most welcome sights to any captain and crew. Visit, enjoy, and soak it in. The beauty of the place itself is only eclipsed by the kindness and professionalism of the team that runs it. Cheers. Jameson Smith & Family // M/V Luna II

by Robert W. - Verified user on Aug 23, 2023
Dock person was having trouble with his VHF

by James H. - Verified user on Aug 23, 2023
Easy to book a slip and assistance getting in. Very good experience.

by David T. - Verified user on Aug 22, 2023
Peaceful and beautiful island. Great marina.

by Patrick F. - Verified user on Aug 22, 2023
Great marina. Friendly staff!

by Syd R. - Verified user on Aug 21, 2023
Dockmaster Chris was excellent!

by Jeff O. - Verified user on Aug 21, 2023
Great stay and Chris the Dock Master was outstanding. Very accommodating and very customer focused.

by Rafe A. - Verified user on Aug 20, 2023
The staff at the dock was amazing! Thanks you.

by Audrey J. - Verified user on Aug 20, 2023
We only docked at the marina. There was a wedding at the Edge. Chris at the marina gets 5 stars though! :)

by David B. - Verified user on Aug 17, 2023
Very nice service! Easy walk to restaurants

by Jake F. - Verified user on Aug 14, 2023
Our party was met at the dock by Chris and his staff, smiling and ready to catch lines! The slip space was conveniently located close the ramp. We had a great stay.

by Gary R. - Verified user on Aug 14, 2023
The dock staff was extremely helpful, informative, and professional. We will return as it was a true pleasure to stay here.

by Robb L. - Verified user on Aug 13, 2023
Chris the dock master was terrific. It was very busy with boats arriving for dinner and he took the time to make sure we were properly tied up, had shore power, etc.
View all on Marinas.com

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 105 ft. Our marina is available for guests at Diamond's Edge Restaurant, the Crown Jewel, the Inn at 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’s Edge and Crown Jewel Restaurants, 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.

- 0' to 22' $10
- 22' to 45' $15
- 45' to 80' $30
- 80' to 101' $80

- 0' to 22' $15
- 22' to 45' $20
- 45' to 80' $45
- 80' to 101' $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 Hookup
  • Electrical


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



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