Inn At Diamond Cove, Portland - Reviews, Room Options & Prices 2025

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About the Hotel

18 Mckinley Ct, Portland, Maine, United States, 04109

Inn At Diamond Cove offers elegantly appointed luxury condominiums on Great Diamond Island in Casco Bay, featuring balconies, wide wooden porches, swimming pool, and cabana bar. This 3-star retreat, housed in former Fort McKinley Barracks from the 1890s, provides a car-free island sanctuary with secluded beaches and acres of old-growth forest.

Luxury Island Condos

Condos feature king bedrooms with custom-made pillow-topped mattresses, hardwood floors, and spacious bathrooms with granite-top vanities. Select units at Inn At Diamond Cove include living rooms with queen sleep sofas and kitchenettes.

Waterfront Dining Options

Diamond's Edge Restaurant, steps from the full-service marina, serves local seafood and New England favorites with ocean views. The Lobby Bar Café provides Starbucks coffee, breakfast buffet, and grab-n-go lunch options.

Sports and Recreation

On-site amenities include tennis courts, indoor basketball court, duckpin bowling, and yoga studio. The Inn at Diamond Cove partners with Ripple Effect for activities like sea kayaking, wall climbing, and coastal ecology lessons.

Island Transport Hub

Located 9.5 miles from Portland International Jetport, the property is accessible by ferry, water taxi, or private boat. Golf cart transportation is provided from Diamond Cove Marina to accommodations.

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Select your room type

The hotel offers a variety of rooms including double rooms, family rooms, and suites with breakfast, free cancelations, and special deals

Double Queen Suite Balcony

Max:

6 persons

79 m²

Bed options:

2 Double beds

Shower

Coffee machine

room details

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King Room Balcony

Max:

2 persons

Bed options:

1 King-size bed

Shower

Coffee machine

room details

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King Room

Max:

2 persons

Bed options:

1 King-size bed

Shower

Coffee machine

room details

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Price and Room Availability Calendar

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Getting around

A guide to all available transportation options

City Centre

Portland500 m

Airports

Portland International Jetport (PWM) 14.7 km

Augusta State (AUG) 94.9 km

Facilities

Experience a variety of amenities at the boutique hotel, crafted to ensure your comfort and unforgettable moments

Wi-Fi

Parking

Luggage storage

24-hour services

General

No smoking on site
Wi-Fi
No parking
No pets allowed
Rooms/ Facilities for disabled
Security
Luggage storage
Lift
Coffee shop
Fireplace
Smoke detectors
Fire extinguishers
Key card access

Sports & Fitness

Fitness centre
Hiking
Tennis court
Bowling
Billiard tables
Fishing

Services

Grocery shopping service
Welcome drink

Dining

Restaurant
Snack bar
Bar/ Lounge area
Packed lunches

Children

Board games
Children's play area

Spa & Leisure

Seasonal outdoor pool
Beach access
Sun loungers
Garden area
Jacuzzi

Room features

Air conditioning
Soundproofed rooms
Sitting area
Garden furniture
Dining table

Media

Flat-screen TV
AM/FM alarm clock

Room decor

Carpeted floor

Location

18 Mckinley Ct, Portland, Maine, United States, 04109

Map view

18 Mckinley Ct, Portland, Maine, United States, 04109

City landmarks

Cow Island

1.3 km

Cow Island

Fort Lyon

1.4 km

McKinley Estates

1.0 km

98 Diamond Shore Rd Great Diamond Island

Echo Point Light

1.0 km

Island

Peaks Island

2.5 km

Island

Little Diamond Island Landing

2.1 km

Island

Mackworth Island

2.9 km

Echo Pond

2.0 km

Portland

Fort Gorges

3.0 km

Museum

Umbrella Cover Museum

3.0 km

45 Seashore Ave

Fifth Maine Regiment Community Center

3.4 km

Gallery

Richard Boyd Art Gallery

3.0 km

Mackworth Island Trail

Fairy Houses Island

2.7 km

Battery Steele

3.0 km

Gallery

Gem Gallery

3.0 km

Park

Mackworth Island State Park

3.2 km

Museum

Portland Observatory

4.6 km

Lighthouse

Portland Head Lighthouse

6.7 km

Island

House Island

3.5 km

Beach

East End Beach

3.9 km

Park

Eastern Promenade

4.4 km

Portland

Fort Allen Park

4.1 km

Island

Clapboard Island

3.9 km

Lighthouse

Bug Light Park

4.4 km

Lighthouse

Spring Point Ledge Lighthouse

4.4 km

Museum

Portland Museum of Art

6.2 km

Bridge

Martin's Point Bridge

4.0 km

Great Diamond Island

Diamond Cove

4.3 km

Castle

Fort Preble

4.5 km

Nearby

Great Diamond Island

460 m

Restaurants

Diamond Cove General Store

210 m

255 Diamond Ave

Reviews and Ratings

Feedback from previous guests about their experience.

54%

enjoyed the hotel and would happily stay again

5.4/10

Guest rating

Rooms

9.0

Location

8.0

Service

6.4

Dining

6.8

Martin

United States, February 2025

5.2/10

Staying at the Inn At Diamond Cove was a beautifully unique experience on Great Diamond Island. The spacious room was both comfortable and stylish, perfect for a getaway. Unfortunately, the service was often lacking, with understaffing leading to long waits and a feeling of neglect. Overall, the enchanting setting made up for some of the shortcomings, and I'd recommend it for a relaxing retreat if you're prepared for some delays.

Rooms

10.0

My room was large, beautifully decorated, and had excellent amenities like a microwave, toaster, and coffee maker. The beautifully appointed suites made it feel special.

Service

6.0

While the staff was friendly and eager to assist, the understaffing led to frustrating delays in service. At times, requests went ignored, which dampened my stay.

Location

8.0

The island is stunning and offers a car-free, tranquil atmosphere that enhances relaxation. However, there are limited ferry services, so plan accordingly.

Dining

7.0

Dining options at the Inn were good, but I found myself longing for more attentive service during meals, sometimes waiting too long for my orders. However, the food was quite delicious.

Facilities

8.0

The heated pool and relaxing outdoor spaces were lovely additions. However, the bicycles available were often in poor condition. The general facilities were pleasant, though.

Nathan

United States, February 2025

5.2/10

I thoroughly enjoyed my stay at the Inn at Diamond Cove, with standout features like beautifully designed rooms and a unique island experience. However, I was disappointed with the level of service, as staff seemed overwhelmed and often inattentive. Additionally, be prepared for potential noise issues if your room is close to common areas, which can disrupt your relaxation.

Rooms

9.0

The rooms were stunning and well-appointed, showcasing a blend of comfort and elegance with modern amenities. I loved the cozy fireplace and the spacious layout that made my stay feel special.

Service

5.0

Unfortunately, the service left a lot to be desired. At times, the staff seemed too busy to respond to guest needs, and I found myself waiting a long time for basic service, which detracted from my overall experience.

Location

7.0

The location on a car-free island was a refreshing change and added to the tranquility of my stay. However, the lengthy ferry rides to and from the mainland might not be ideal for everyone.

Dining

6.0

While the dining options were ample and the food quality was decent, I encountered some service hiccups, leading to a less than stellar dining experience. Improvements in staff communication would enhance this aspect greatly.

Facilities

8.0

The facilities were well-maintained and provided good recreational options, including bicycles and access to outdoor activities, which made my stay enjoyable despite a few minor setbacks.

Austin

United States, February 2025

5.2/10

I enjoyed my stay at the Inn at Diamond Cove despite some hiccups. The scenic location on a car-free island provided a peaceful escape, and the modern design of the room was truly stunning. However, I did experience noise disturbances in the morning, which detracted from my overall sleep quality. Overall, I'd recommend this place with a caveat to request a quieter room.

Rooms

8.0

My room was beautifully designed with a modern kitchen and a cozy fireplace, perfect for unwinding. However, the noise from the kitchen area in the morning was quite disruptive.

Service

7.0

The staff were friendly and accommodating, especially the manager who offered a discount for my inconvenience. I appreciated their willingness to help but sometimes it felt a little stretched due to staff multitasking between different roles.

Location

8.0

The hotel is situated on a lovely island, adding to a unique getaway experience. The ferry ride to get there took longer than expected, but the tranquil atmosphere was worth it.

Dining

6.0

Dining options were limited and not particularly special. I found breakfast options quite lacking and the pricing at the bar seemed steep. A little more variety would enhance the experience.

Facilities

7.0

The heated pool and outdoor activities were highlights of my visit, allowing for a fun way to enjoy the surroundings. However, I was left wanting for more rental options, like bikes or kayaks.

John

United States, February 2025

6.2/10

I found Inn At Diamond Cove to be a serene retreat with beautiful room designs and access to wonderful dining options. However, I felt that service could be improved, particularly around check-in and meal responsiveness. The unique island experience is captivating, but some facilities seemed to lack in upkeep during my stay.

Rooms

10.0

My room was spacious and lovely, complete with high-quality furnishings and a cozy outdoor sitting area. It really exceeded my expectations for comfort and style.

Service

7.0

While my experience with the staff was generally positive, I did notice some areas needing attention, especially regarding check-in delays and meal service, which could certainly be improved.

Location

9.0

The hotel’s location on a car-free island is truly unique and enhances relaxation, providing stunning views of the ocean and opportunities for exploration.

Dining

8.0

Dining at Water's Edge was superb, and I enjoyed a beautiful lunch on the lawn overlooking the cove. Nonetheless, there were a few dining service issues that needed addressing.

Facilities

7.0

The facilities were beautiful, but I encountered some inconveniences, like delays in service and issues with the pool equipment that detracted from my overall experience.

Anthony

United States, November 2024

5.8/10

I had such a amazing stay at Inn At Diamond Cove! The setting was stunning and peaceful, which made it a perfect retreat. The staff was incredibly friendly and attentive, going out of their way to ensure I was happy. However, I did encounter some inconsistencies, like the cleanliness of my room not meeting expectations initially, which affected my overall experience.

Rooms

8.0

The bi-level 2 queen room was spacious and beautifully appointed, but I did notice the carpet could use a vacuuming. The bathrooms were gorgeous and offered great amenities, but the overall cleanliness fell short initially.

Service

7.0

Service was mostly fantastic, with staff eagerly providing assistance, though I did feel a bit overlooked during peak times when wedding groups were present. They showed dedication, especially during the power outage, providing meals for free to all guests.

Location

8.0

The location was absolutely beautiful and unique, located on a car-free island with fascinating military buildings. However, the ferry ride was long, and I would’ve appreciated clearer information about that before arriving.

Dining

7.0

Dining options were good at the inn, with excellent quality food at the nearby restaurant. But I had some issues with meal speed and coordination during busier times, particularly at the Diamonds Edge Restaurant.

Facilities

6.0

The facilities included a heated pool that I absolutely loved, but I noticed some issues, like the outdoor bathroom lacking a door knob, which was a bit off-putting. Overall, the amenities offered a lot of activities to enjoy.