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

159 Reviews

by Patrick F. - Verified user on May 23, 2026

Great marina. Friendly staff!

Marina Response:

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

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 John L. - Verified user on Aug 24, 2025

The staff always welcomes the Slainte’s guests graciously and assists as necessary. First class accommodations

Marina Response:

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

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!

by Steven w. - Verified user on Aug 14, 2025

Super easy and great restaurant!

Marina Response:

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

by Michael L. - Verified user on Aug 10, 2025

Great marina nice people

Marina Response:

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

by Robert W. - Verified user on Aug 09, 2025

Helpful and friendly service at the dock - great experience - thank you.

Marina Response:

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

by Thomas A. - Verified user on Aug 09, 2025

Friendly, helpful staff. Great experience.

Marina Response:

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

by james v. - Verified user on Aug 08, 2025

the dockmaster was excellent, we had a nice comfortable slip. The bathroom and cold shower was .25 miles away, making it a Half Mile round trip . There was no hot water in the bathhouse. The Island is private, so there were no trails or roads to walk on, the Inn had a pool, but it was for guests of the Inn only. The WIFI was down on the docks, and there was no cell service, but I did not expect that anyway. The restaurant was excellent, well worth the price, and service was very good.

Marina Response:

Hi James, it sounds like you had a good experience overall. We understand the bathroom's are a bit of a walk. In the future, you are always welcome to ask our staff for a complimentary golf cart ride! We are sorry about the water temperature and WiFi issues, I assure you that is not the standard we set for ourselves. Our maintenance team was notified of this and the issue is resolved. For your next visit, ask our team for a map of the island that will point out some public trails and beaches for you to enjoy. Cheers, Diamond's Edge Marina team.

by Ryan N. - Verified user on Aug 08, 2025

Such a lovely spot and a great crew!

Marina Response:

Hi Ryan, 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.