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With a brief and scenic boat ride from downtown Portland you are transported from the hustle and bustle of Portland’s Old Port district through the sparkling waters of Casco Bay to peaceful Great Diamond Island. Diamond’s Edge Restaurant is situated just steps from the marina, overlooking Diamond Cove
Seasonal restaurant & bar serving American fare & locally sourced seafood, overlooking Diamond Cove.
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Diamond’s Edge Restaurant & Marina
Now Booking 2026 Weddings ; MARINA. A Full-Service Marina. Accommodating Large Sailboats and Motor Boats. ; RESTAURANT. Casually Elegant Waterfront Dining. View …
Dining – Portland – Inn at Diamond Cove
22 McKinley Court • Portland, ME 04109 • (207) 805-9836. Book Now! Dining. Diamond’s Edge Restaurant & Marina … For more information please visit the Diamond’s …
Oceanfront Dining | Diamond’s Edge Restaurant | Portland, Maine
Call (207) 766-5850. Catering & Weddings. We provide catering and wedding services. Our lobster bakes are a great way to celebrate your next event.
Reviews
Mallory Nightingale
If you’re considering The Inn at Diamond Cove as your wedding venue — book it. We had a 200+ person wedding with a lot of moving pieces, detailed logistics, transportation planning, and a full weekend of events — and the team at Diamond Cove absolutely delivered from start to finish.
From the very beginning, they were professional, responsive, and truly invested in making sure everything went smoothly. We weren’t planning a simple “show up and get married” day — our wedding involved a ton of coordination, and their willingness to work with us on the details made a massive difference in our overall experience.
We did a full buyout of the inn, and it was hands-down one of the best decisions we made for our wedding weekend. It gave the entire event a private, elevated feel — like we had our own little world for the weekend.
Having our friends and family staying on-site created such a fun, connected atmosphere and made everything easier:
*Guests didn’t need to worry about commuting
*People could relax and stay in “wedding mode”
*The entire experience felt seamless and special
We also hosted our afterparty at the inn, and it was honestly the perfect ending to the night. It was fun, effortless, and convenient — and we loved being able to keep the celebration going without needing to move everyone to another location.
It felt like the venue was designed for exactly this kind of wedding experience: a big celebration, done beautifully, without unnecessary hassle.
If you’re planning a wedding that’s large, detailed, or logistically complex, you want a venue that can truly execute — and The Inn at Diamond Cove absolutely can. We are so grateful we chose them and would recommend them a thousand times over.
… moreFrom the very beginning, they were professional, responsive, and truly invested in making sure everything went smoothly. We weren’t planning a simple “show up and get married” day — our wedding involved a ton of coordination, and their willingness to work with us on the details made a massive difference in our overall experience.
We did a full buyout of the inn, and it was hands-down one of the best decisions we made for our wedding weekend. It gave the entire event a private, elevated feel — like we had our own little world for the weekend.
Having our friends and family staying on-site created such a fun, connected atmosphere and made everything easier:
*Guests didn’t need to worry about commuting
*People could relax and stay in “wedding mode”
*The entire experience felt seamless and special
We also hosted our afterparty at the inn, and it was honestly the perfect ending to the night. It was fun, effortless, and convenient — and we loved being able to keep the celebration going without needing to move everyone to another location.
It felt like the venue was designed for exactly this kind of wedding experience: a big celebration, done beautifully, without unnecessary hassle.
If you’re planning a wedding that’s large, detailed, or logistically complex, you want a venue that can truly execute — and The Inn at Diamond Cove absolutely can. We are so grateful we chose them and would recommend them a thousand times over.
Maria P
Choosing Great Diamond Island for our wedding was the best choice we could’ve made!! Colleen and her team were so wonderful, communicative, and helpful from the first time we reached out. They answered all of our (many many) questions quickly, were extremely flexible in ensuring all the details fit our wants and needs, and overall made planning feel low-stress and so exciting. From the tasting weekend to the wedding weekend, we felt so welcome and taken care of. The Inn, restaurant, and wedding staff truly helped us make it our dream day and provided an absolutely incredible experience for our guests.
… moreAshley S
We learned about this place on vacation from another restaurant owner. It was a short ferry ride to get here from Portland. The view it self is worth it! The service could have been a little better- mostly younger kids working during the summer.
But, the drinks and food were amazing! My husband had a lobster with clams- so good and fresh. I had a spicy linguine with clams and mussels- it was so good! The clam chowder was also, very good. Highly recommend coming out to diamond cove, having lunch and exploring the fort. Very cool piece of history.
… moreBut, the drinks and food were amazing! My husband had a lobster with clams- so good and fresh. I had a spicy linguine with clams and mussels- it was so good! The clam chowder was also, very good. Highly recommend coming out to diamond cove, having lunch and exploring the fort. Very cool piece of history.
Claire Murray Flythe
Our wedding experience with Colleen and the rest of the team at Diamond’s Edge / Inn at Diamond Cove was so wonderful from start to finish! Months later, guests are still telling us how special and unique the whole experience of attending a wedding on an island felt and the team at the venue was such a huge part of that!
The inn was the perfect place to get ready, so calm, beautiful, and such a lovely environment for the bridal party as a way to set the tone for the day! The team was incredibly helpful with logistics on the day of, including shuttling us to and from the dock and wedding tent, which made the day feel smooth and stress-free.
In the months and weeks leading up to the wedding, the team was so supportive in helping us coordinate details and bring items over to the island as out-of-towners! They answered all of our many questions about the logistics of having a wedding on an island and hosted a lovely tasting with our families at the Portland Harbor during the planning process!
On rehearsal day and wedding day, Colleen and her team ran everything efficiently and seamlessly! The food and signature cocktails were excellent, and we felt so taken care of, as did our guests! The team helped organize pre-ceremony drinks at Diamond’s Edge and it was such a special way to welcome our guests!
Great Diamond Island is such a special place, and this team does an incredible job of creating an experience that feels just as magical as the island itself!
… moreThe inn was the perfect place to get ready, so calm, beautiful, and such a lovely environment for the bridal party as a way to set the tone for the day! The team was incredibly helpful with logistics on the day of, including shuttling us to and from the dock and wedding tent, which made the day feel smooth and stress-free.
In the months and weeks leading up to the wedding, the team was so supportive in helping us coordinate details and bring items over to the island as out-of-towners! They answered all of our many questions about the logistics of having a wedding on an island and hosted a lovely tasting with our families at the Portland Harbor during the planning process!
On rehearsal day and wedding day, Colleen and her team ran everything efficiently and seamlessly! The food and signature cocktails were excellent, and we felt so taken care of, as did our guests! The team helped organize pre-ceremony drinks at Diamond’s Edge and it was such a special way to welcome our guests!
Great Diamond Island is such a special place, and this team does an incredible job of creating an experience that feels just as magical as the island itself!
Bill Covert
Super romantic and beautiful setting right on Casco Bay out on great diamond Island. Our waitress, MARIA was from Romania and spoke multiple language with ease. Wonderful service, wonderful food, and of course we had wonderful company dining out with four of us. I did not take pictures during the night, but here are a couple of the view we saw the next day. I am bringing our team Seacoast Roofing Of NH out here for a fall retreat. Darn it… I didn’t get any pictures of our table and how our view looked. But here are some pictures I took from the island.
… morecyoung
We enjoyed our evening, relaxing adjacent to the waterfront, EXCELLENT cocktails, attentive wait staff and AWESOME food. Limited menu choices but everything was done well. Overall a great experience.
… moreAlexa Neri-Tomazin
The place was absolutely beautiful. The owner was so friendly and welcoming. Our server, Maria, was very personable. The food was excellent and wish we were able to spend more time there!
… moreAndrew Hager
I had the pleasure of photographing a wedding at Diamond’s Edge this summer and WOW, it was such a great experience. The rooms are great for getting ready in. The staff is so attentive and will gladly cart you around the island as you need it, and you will definitely need it with so much going on during your Diamond Island Wedding. Diamond’s Edge provides a professional, efficient, and friendly experience. Highly recommended!
… moreTori & Liam
We had our Fall 2025 wedding on Great Diamond Island and the day could not have been more perfect! Not only is the setting breathtaking, Colleen and Amber– who was there from rehearsal through last call on wedding night!– were truly a dream team to work with. They answered our many questions and made the planning process a breeze. They both anticipated our needs– we had a draft timeline in our inbox before I could fully wrap my head around making one– accommodated our preferences (like making sure the bar had our favorite beer from a Maine brewery), and had a sharp eye for detail that made everything look beautiful, run smoothly, and taste delicious.
When plans or timing shifted, Amber was cool as a cucumber and kept things moving along (at the last minute we decided to greet our guests coming off the ferry at the dock and Amber was right behind us with a golf cart to bring us back up to the ceremony site) without ever rushing us and emphasizing that she was there to facilitate the magic. We’ve heard repeatedly from our guests that it was one of the most beautiful weddings they’ve been to and we could not be happier with how our day turned out.
Truly, our day was as beautiful as it was thanks to Amber, Colleen, and the entire Diamond’s Edge team.
… moreWhen plans or timing shifted, Amber was cool as a cucumber and kept things moving along (at the last minute we decided to greet our guests coming off the ferry at the dock and Amber was right behind us with a golf cart to bring us back up to the ceremony site) without ever rushing us and emphasizing that she was there to facilitate the magic. We’ve heard repeatedly from our guests that it was one of the most beautiful weddings they’ve been to and we could not be happier with how our day turned out.
Truly, our day was as beautiful as it was thanks to Amber, Colleen, and the entire Diamond’s Edge team.
Natasha Spellman
As a born and raised Mainer, I knew I wanted to get married by the ocean. After doing our research and touring multiple venues along the coast, we knew Diamond’s Edge was the perfect choice for us. Set in Maine’s beautiful Casco Bay, the venue allowed us to show our guests just how stunning our state can be. Most of our guests travelled in for the big day and it was fun having them get the authentic ferry experience!
Along with the idyllic backdrop and facilities, Diamond’s Edge provided unparalleled service. Colleen and Greg (and so many others!) went above and beyond for our wedding weekend. I cannot stress enough how helpful, kind, and understanding they were from the initial planning stage through seeing us off after the wedding. Before the weekend, I had my worries about transportation to the island (guests, vendors, decorations, etc.), set up and clean up; however, Colleen was exceptional and incredibly organized throughout the process. Their team runs like a well-oiled machine.
Also, THE FOOD. We have gotten numerous comments about how delicious the appetizers and entrees were! Shout out to the mini lobster rolls, beef wellington bites, ahi tuna spoons, and the beef tenderloin. Everything we ate went beyond our expectations.
In conclusion, Diamond’s Edge is a fantastic venue. One that we will continue to visit for our anniversary every year. We are so thankful to everyone that helped make our best day possible.
… moreAlong with the idyllic backdrop and facilities, Diamond’s Edge provided unparalleled service. Colleen and Greg (and so many others!) went above and beyond for our wedding weekend. I cannot stress enough how helpful, kind, and understanding they were from the initial planning stage through seeing us off after the wedding. Before the weekend, I had my worries about transportation to the island (guests, vendors, decorations, etc.), set up and clean up; however, Colleen was exceptional and incredibly organized throughout the process. Their team runs like a well-oiled machine.
Also, THE FOOD. We have gotten numerous comments about how delicious the appetizers and entrees were! Shout out to the mini lobster rolls, beef wellington bites, ahi tuna spoons, and the beef tenderloin. Everything we ate went beyond our expectations.
In conclusion, Diamond’s Edge is a fantastic venue. One that we will continue to visit for our anniversary every year. We are so thankful to everyone that helped make our best day possible.