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

164 Reviews

by Greg M. - Verified user on Jul 05, 2026

Great service at the marina and great service at the restaurant. The marina power was a bit wonky but the awesome dockmaster sorted that out right way.

by Nicholas V. - Verified user on Jul 03, 2026

Christopher was excellent. However, words cannot describe the disappointment that we feel with the dynamic pricing structure that is in place. Boating is our escape from reality and the rigs of everyday life on land. It is severely disappointing to run into dynamic pricing on the water. it is very unfortunate that we need to explore other options such as the Dolphin Marina or dockside Grill other dock and dine options that do not share your need for dynamic pricing. In fact the other locations do not charge a feet to dock.

Marina Response:

Hi Nicholas. We sincerely appreciate your candid feedback regarding our dynamic pricing. We know our guests look to the water to relax and unplug, and we apologize for the disappointment this policy caused. We use this pricing structure during holiday weekends to balance high demand and ensure safe, available dock space for our visitors. On the day you visited, our holiday rates were $10 more for a 22' vessel. We recognize that this model differs from other local options, and we take your comments seriously as we evaluate our guest experience. You are wonderful guests, and we hope to see you again.

by Geoffrey K. - Verified user on Jun 29, 2026

Lovely Marina, fabulous restaurant. BUT… NO WIFI AT END OF DOCK (and virtually no AT&T cell service either on the island). Not much to do, beaches are private. Home owners (except kids) are nasty to non-owners.

Marina Response:

Thank you for taking the time to share your feedback. We are sorry to hear your stay did not meet your expectations. The marina is located on a private island with very few public roads, and mostly private access to the beaches. However, Kayak Beach is public, and we will make sure to better inform our guests of this. WiFi is excellent a bit closer to the dock office, and anywhere near the restaurant. We hope you return, and we will reserve you a slip with better service.

by Lance V. - Verified user on Jun 28, 2026

Great customer service. Very friendly and attentive!

Marina Response:

Thank you Lance. it always a pleasure having you and Gina in the marina.

by Kenneth R. - Verified user on Jun 27, 2026

Great location, good docks and very helpful, and personable staff. Thank you, Chris!!

Marina Response:

Thank you Kenneth. We appreciate you taking the time, to give us this positive feedback on our efforts. Chris, Cove, Atticus

by Jeff S. - Verified user on Jun 19, 2026

Perfect stay, excellent help on the docks

Marina Response:

Thank you Jeff, We will look forward to the next time we can host you and Susy.

by John L. - Verified user on Jun 15, 2026

The staff always welcomes the “What Happened” guests graciously and assists as necessary. First class accommodations. Chris the Dock Mng is not only very professional he is an awesome person!

Marina Response:

Thanks so much John. It's always a pleasure having you and your family in the Marina.

by Patrick F. - Verified user on Jun 07, 2026

Great marina. Friendly staff!

Marina Response:

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

by Gretchen P. - Verified user on Oct 05, 2025

Great docking location

by Jeff O. - Verified user on Sep 19, 2025

Great stay the Dock Master was outstanding. Very accommodating and very customer focused.

Marina Response:

Hi Jeff, we're so happy you enjoyed your stay with us. We can't wait to host you again!

by George L. - Verified user on Sep 14, 2025

Very helpful dock hands.

Marina Response:

Hi George, we're so happy you enjoyed your stay with us. We can't wait to host you again!

by Richard G. - Verified user on Sep 14, 2025

Great place with pleasant staff

by Adam L. - Verified user on Sep 13, 2025

Very nice Marina. Take a few minutes to walk around the island, it's beautiful.

by Kevin H. - Verified user on Sep 07, 2025

Excellent service at Diamond's edge

Marina Response:

Thanks, Kevin! Always a pleasure having you in the cove.

by James L. - Verified user on Sep 05, 2025

I’m an old-fashioned guy not a big fan of Docwa I like to pull into a marina and call on my radio versus making appointments online. But I must say this worked out fine thank you

Marina Response:

Hi James, we're so happy you enjoyed your stay with us. We can't wait to host you again!

by Mike F. - Verified user on Sep 03, 2025

Great spot to take a rest for a day or two. Quiet, friendly spot staff helpful. There is a nice restaurant on the island .

Marina Response:

Hi Michael, we're so happy you enjoyed your stay with us. We can't wait to host you again!

by George S. - Verified user on Sep 02, 2025

Amazing stay, Jack was very helpful and knowledgeable about the island. We had dinner and stayed overnight at the inn. We will definitely do this again, we had an amazing time!

Marina Response:

Hi George, we're so happy you enjoyed your stay with us. We're glad Jack was able to provide you with a fantastic experience. We can't wait to host you again!

by Vince T. - Verified user on Sep 02, 2025

They made us feel like we were very special.

Marina Response:

Hi Vince, that is always our goal - we're so happy you enjoyed your stay with us. We can't wait to host you again!

by Stacey K. - Verified user on Sep 02, 2025

We called in several times to dock for our reservation and no one picked up. Same with another boat trying to dock at the same time. We waited for 15 minutes and were late for our restaurant reservation. No one ever showed up, so we just docked ourselves. It’s ridiculous to have to pay for no service. They used to be really good—we were extremely disappointed.

Marina Response:

Hi Stacey, we are terribly sorry for your lackluster experience. We put a tremendous amount of effort into our guest experience at Diamond's Edge Marina and every boater docking with us should expect to receive friendly docking assistance. In your case, I believe what happened is our dockhand was pulled away to assist another guest on the island and our radio was out of range the moment you arrived. We are very sorry about this and would love to make it up to you the next time you visit. Cheers, Diamond's Edge Marina team.

by Donald J. - Verified user on Sep 01, 2025

Beautiful small marina with access to the island for biking, walking and exploring the military base. Very quiet area with nice restaurant right by the dock. Dockmaster Wolfgang worked super hard to find small spots for everyone.

Marina Response:

Hi Donald, we're so happy you enjoyed your stay with us. We're glad Wolfgang was able to provide a memorable experience for you. We can't wait to host you again!

by Peter M. - Verified user on Aug 25, 2025

Outraged by the excessive fee and requirement of a Dockwa account in order to tie up at the marina for two hours to go to supper at the restaurant. Unlikely to return.

Marina Response:

Hi Peter, I sent you an email this morning. We truly enjoy hosting you here in the cove and I look forward to working with you to remedy your concerns. Cheers, Simon Hulbert.

by Pamela D. - Verified user on Aug 24, 2025

I was a beautiful spot.

Marina Response:

Hi Pamela, we're so happy you enjoyed your stay with us. We can't wait to host you again!

by Ralph P. - Verified user on Aug 18, 2025

The marina is old and could use an upgrade from three-phase 208 VAC to single-phase 230 VAC. It was okay and we may stay again. The service and food at the restaurant has really gone downhill since we were last ate there in 2018. Our waiter had very little knowledge of the menu, gave us the wrong description of the meal I ordered and disappeared after our meals were served. We ate and waited 20 minutes to pay our check. We finally left cash at the table and walked out.

by Bill M. - Verified user on Aug 17, 2025

Always love our stay at diamond cove.

Marina Response:

Hi Bill, we're so happy you enjoyed your stay with us. We can't wait to host you again!

by Al F. - Verified user on Aug 15, 2025

Nice folks, great spot to visit and enjoyed the restaurants and bars.

Marina Response:

Hi Al, we're so happy you enjoyed your stay with us. We can't wait to host you 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.