Diamond's Edge Restaurant & Marina

Dock
Offered

Mooring
Not Offered

Day Trip
Offered

Great Diamond Island
Portland, ME 04109

Check-in after 01:00 PM
Check-out before 11:00 AM

VHF 9

Book faster with the free Dockwa app

189 Reviews

by Patrick F. - Verified user on Sep 05, 2026

Great marina. Friendly staff!

Marina Response:

Hi Patrick. Thank you for your kind review. See you again soon.

by Bruce T. - Verified user on Sep 05, 2026

Nice Marina, and dock master.

Marina Response:

Thank you for the kind review Bruce.

by Jason D. - Verified user on Sep 04, 2026

Beautiful location, nice docks, amazing dock staff.

Marina Response:

Hi Jason. We are pleased that you enjoyed your visit. Thank you for the great review.

by Bobby S. - Verified user on Aug 31, 2026

awesome, dock master is great

Marina Response:

It is always our pleasure having you, and your crew, in the marina. Thank you for the kind review Bobby.

by Beth C. - Verified user on Aug 30, 2026

Super easy process and very precise docking instruction (dock location, tie up location.) Thanks!

Marina Response:

Hi Beth. Thank you for recognizing our efforts to provide a quality docking experience. We appreciate that you hailed us VHF 09 when entering Diamond Cove. This communication, initiated by you, allowed us to give our best service. We hope to see in the marina again soon.

by Ivan H. - Verified user on Aug 30, 2026

Dock attendant was super helpful!

Marina Response:

Hi Ivan. We're glad you had a good visit to Diamond's Edge Marina. Thank you for taking the time to share your experience.

by Kevin C. - Verified user on Aug 23, 2026

Great and helpful staff.

Marina Response:

We appreciate your positive review. Thank you Kevin.

by Jerry K. - Verified user on Aug 23, 2026

Great experience- dock staff were extremely helpful and polite. Look forward to returning.

Marina Response:

Thank you for your kind review Jerry. We hope to see you again soon.

by Ted H. - Verified user on Aug 23, 2026

Great small marina with two good restaurants a short walk away. The main inn has a great breakfast. Chris Johnson, the dock manager, is the best!! Atticus, a new dock helper under Chris is super helpful and wants your stay to be the best.

Marina Response:

Our team appreciates your positive feedback. Thank you Ted.

by Kenneth G. - Verified user on Aug 09, 2026

Dockmaster Chris and Cove, his assistant were great. Lovely stay.

Marina Response:

Hi Kenneth. Your kind review is very much appreciated. We are pleased that you had a lovely stay, and hope to see you again soon.

by Bruce R. - Verified user on Aug 07, 2026

My experience with Dockwa and diamond Edge was fabulous. May I highly encourage to use them for all of your of dockage. The restaurant Crown Jewel is my favorite. A solid 10. Service, atmosphere effortless. ..fun

Marina Response:

Hi Bruce. We appreciate your positive review of our marina, and the Dockwa App. We hope to see you again soon.

by Nathan h. - Verified user on Aug 06, 2026

Very happy the process was easy and fast 10 out of 10 will do it again

by Peter M. - Verified user on Aug 05, 2026

Beautiful place and great harbormaster!

Marina Response:

Hi Peter. Thank you for the kind review of our marina and staff. We hope to see you in the Cove again soon.

by Michael M. - Verified user on Aug 03, 2026

Team was prompt on radio and help with docking.

Marina Response:

Thank you Michael. We appreciate you sharing your positive experience.

by Tim D. - Verified user on Aug 03, 2026

Chris was terrific… a beautiful Island

Marina Response:

Hi Tim. We are pleased that you enjoyed your visit. We hope to see you again soon.

by stephan M. - Verified user on Aug 03, 2026

Beautiful cove. Good restaurants and attentive dockmaster. Wakes and constant ferries can be annoying

Marina Response:

Hi Stephan. Thank you for recognizing our efforts to provide excellent service. We hope you return soon.

by Robert P. - Verified user on Aug 03, 2026

Chris was so accommodating and the setting and amenities are amazing. The Marina is tucked in a picturesque cove and it’s very small so it feels very peaceful and private.

Marina Response:

Hi Robert. Thank you for sharing your experience with other potential visitors. We appreciate your review.

by Gretchen P. - Verified user on Aug 02, 2026

Very helpful dock guy.

Marina Response:

Hi Gretchen. It was a pleasure having you and your crew in the marina. We hope you visit again soon.

by Daniel R. - Verified user on Jul 27, 2026

Great experience at Diamond's Edge. Dockmaster was extremely professional and friendly. Easy process overall and we'll be back.

Marina Response:

Hi Daniel. Thank you for your kind review of our marina, and staff. We look forward to seeing you again soon.

by Jeffery C. - Verified user on Jul 26, 2026

Excellent! Chris the dockmaster was amazing and the property is beautiful. We enjoyed walking up through the parade grounds to the Inn and had an amazing dinner at The Crown Jewel. We will be back!!

Marina Response:

Hi Jeffery. Thank you so much for taking the time to share your experience about your visit. We hope to see you again soon.

by Bill M. - Verified user on Jul 26, 2026

Always love our stay at diamond cove. Chris is always so welcoming - he is part of the experience. Love it.

Marina Response:

Hi Bill. We are glad to hear you felt welcomed, and we appreciate your kind review.

by Warner H. - Verified user on Jul 24, 2026

The dockmaster, Chris, was very helpful. This is one of favorite places to visit on our annual Maine cruise.

Marina Response:

Hi Warner. It is always a pleasure having you in the marina. We look forward to your next visit.

by Charles B. - Verified user on Jul 24, 2026

Beautiful view of the inlet. Very peaceful. I look for to returning. We were there only for a drink.

Marina Response:

Hi Charles. Thank you for taking the time to give a great review our marina. See you again soon.

by Robin A. - Verified user on Jul 23, 2026

Nice marina, Chris was very friendly and helpful. The restaurant leaves some to be desired, not worth the money, but all-in-all, a good place to explore for the day.

Marina Response:

Hi Robin. We appreciate your kind review of our marina.

by Ron S. on Jul 17, 2026

Diamond’s Edge Marina is a spectacular destination. Chris, the dockmaster, went out of his way to accomodate us, not only by making us comfortable in our slip but also by helping us see the island. The marina is set in a magical location (within the City of Portland evidently) where Fort McKinley has been repurposed as a resort. Great Diamond was a highlight of our recent cruise through Maine.

Marina Response:

Hi Ron. Thank you for this wonderful review. It was a pleasure being part of your epic coastal adventure. We hope to see you and Steph in the marina if you pass this way again.

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. For the 2026 Season Diamond's Edge Restaurant will be open for Lunch on Thursday through Dinner in Sunday.

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