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From178US$ /night
Check-in
31Dec2025Select date
Check-out
01Jan2026Select date
Rooms and Guests2 Guests, 1 Room
Key details

About the Hotel

Lassi, Argostoli (Kefalonia), Greece, 28100
-
Steps from Makris Gialos Beach
Perfect
9.2
9.1
/10
4.3
/5

Thalassa Boutique Hotel - Adults Only, a top-rated 4-star hotel with a 9.2/10 rating on Booking.com, offers a romantic escape just above Paliostafida beach, near the popular Makris Gialos. With amenities like two freshwater swimming pools, a fitness center, and an exquisite cocktail lounge bar, it caters specifically to adults seeking tranquility and privacy.

Rooms & Amenities

Rooms at Thalassa Boutique Hotel - Adults Only feature stylish Mediterranean designs, with most offering spectacular sea views from balconies or terraces. The hotel includes a mix of Deluxe Suites, Swim-Up rooms, and the signature White Suite, all equipped with modern amenities such as a refrigerator, coffee-making facilities, and free Wi-Fi.

Dining & Lounging Options

Thalassa Boutique Hotel offers a gourmet dining experience with a Mediterranean breakfast served until 11 am, featuring local ingredients from its own organic farm. Guests can enjoy light meals and signature cocktails at the Eolia Pool Lounge or unwind in the evenings at the Alaia Lounge Bar with stunning sea views.

Recreation & Services

The hotel boasts two freshwater swimming pools surrounded by lush Mediterranean gardens, perfect for relaxation. Fitness enthusiasts will find a fully equipped gym, while the concierge is available to organize excursions and activities across Kefalonia, including access to nearby beaches like Makris Gialos and Vouti Beach.

Location & Transportation

Thalassa Boutique Hotel is conveniently located with easy access to Lassi's vibrant settlement and Argostoli, which are serviced by frequent bus connections. Guests can explore local attractions such as the Italian 'Divisione Acqui' War Museum and Gradakia Beach, both located within 2 km.

“This adults-only boutique hotel in Argostoli sets a tone of refined relaxation. I appreciate the emphasis on local and organic dining. The swim-up rooms and proximity to Makris Gialos beach are definite highlights.”
Hotel logo
Sophia TurnerEditorial Director at Spahotels
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Choose your room type

The hotel offers a variety of rooms including double rooms, family rooms, and suites with breakfast, free cancelations, and special deals
Superior Double or Twin Room
2 persons
28 m² 
1 Double bed
Heating
Balcony
Superior Double or Twin Room Garden View
2 persons
30 m² 
1 Double bed
Heating
Balcony
Deluxe Double Room
2 persons
28 m² 
1 Double bed
Heating
Balcony
Suite Sea View
2 persons
28 m² 
1 Double bed
Heating
Balcony
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Price and Room Availability

Check availability and prices for your dates now!

Facilities

The hotel offers amenities for your comfortable stay and unforgettable experiences

General

  • Non-smoking rooms
  • Free Wi-Fi
  • Parking
  • Safe deposit box
  • 24-hour reception
  • Pets allowed
  • Security
  • Adults only
  • Fireplace
  • Smoke detectors
  • Electric vehicle charging station
  • Fire extinguishers

Sports & Fitness

  • Fitness centre

Services

  • Airport shuttle
  • Room service
  • Housekeeping
  • Car hire
  • Laundry
  • Dry cleaning
  • Tours/Ticket assistance

Dining

  • Restaurant
  • Bar/ Lounge area

Business

  • Fax/Photocopying

Spa & Leisure

  • Seasonal outdoor pool
  • Beach umbrellas
  • Sun loungers
  • Sun terrace
  • Garden area
  • Spa centre
  • Back massage
  • Head massage
  • Full body massage
  • Foot massage

Room features

  • Air conditioning
  • Soundproofed rooms
  • Garden furniture
  • Ironing facilities

Bathroom

  • Free toiletries

Media

  • AM/FM alarm clock
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Dining Onsite

At Thalassa Boutique Hotel, a delightful culinary experience awaits with its Mediterranean flair. Guests can indulge in fresh, local breakfast delicacies, while the captivating sea views provide a serene backdrop to every meal. The inviting ambiance encourages leisurely dining, making every moment special.
Thalassa Boutique Hotel - Adults Only Argostoli  Restaurant photo

Thalassa Restaurant

Mediterranean
Ambiance
A cozy dining room with stunning sea views, creating a serene atmosphere for relaxation.
Key Offerings
An eclectic breakfast menu featuring local delicacies, Kefalonian cheeses, and freshly made desserts. Perfectly balanced for active mornings, complemented by freshly squeezed juices and aromatic coffee.
Reservation
no
Lunch from 14:00 - 16:00 daily

Location

Lassi, Argostoli (Kefalonia), Greece, 28100
Map view
Lassi, Argostoli (Kefalonia), Greece, 28100
Nearby
Strada del Faro di San Teodoro
Casa Rossa
440 m
Beach
Paliostafida beach
310 m
Paralia Makris Gialos
510 m
Restaurants
Tzogias Taverna
730 m
Lassi
Aqua Marina
550 m
not known
Zorbas Restaurant
690 m
Main Lassi Rd
Tanu's
660 m
Restaurant
Butler's House
800 m
Lassi Aerodromiou Argostoli
Da Veronica Bar
730 m
Nearby Veronica's Jewellery
Da Veronica
780 m
Restaurant
Taverna Sirtaki
910 m
Main Road
Nefeli Restaurant
890 m
Restaurant
Explore Argostoli (Kefalonia)
Explore Lassi's Gems
Top Attractions
Activities
Dining
Entertainment
Makris Gialos Beach
Makris Gialos Beach
10 minutes' walk
Stunning sandy beach known for its crystal-clear waters, perfect for sunbathing and swimming. Beach bars and sunbeds available.
Casa Rossa
Casa Rossa
9 minutes' walk
Historic mansion featuring a unique red exterior and beautiful gardens. A picturesque spot for photography and history enthusiasts.
Argostoli Harbour
Argostoli Harbour
25 minutes' walk
Vibrant harbor area with cafes and shops, ideal for leisurely strolls and enjoying the local seafood and stunning sunset views.
Caves
10 minutes' walk
Fascinating natural caves offering a glimpse into the island's geology. Great for brief exploration and appreciating nature.
Water Sports at Makris Gialos
10 minutes' walk
Thrilling water sports such as jet skiing and paddleboarding are available. Rentals and instructors can be found at the beach.
Yoga on the Beach
10 minutes' walk
Relaxing yoga sessions by the sea provide a perfect escape. Check local schedules for classes suitable for all skill levels.
Tzogias Taverna
Tzogias Taverna
9 minutes' walk
Authentic Greek taverna known for its fresh seafood and homecooked meals. Cozy atmosphere, vegetarian options available.
Aqua Marina
Aqua Marina
7 minutes' walk
Charming waterfront restaurant offering Mediterranean cuisine with ocean views. Reservations recommended for peak times.
Argostoli Nightlife
25 minutes' walk
Lively bars and clubs featuring live music and dancing. Vibrant atmosphere perfect for night owls and social outings.
Live Music at Zorbas
9 minutes' walk
Casual dining with live music on select nights. Great for enjoying authentic Greek food with a local vibe.

Getting around
City Centre
Argostoli (Kefalonia)24 min  ·  2.0 km
Airports
Kefallinia Airport (EFL)10 min  ·  6.2 km

Reviews and Ratings

Reviews from guests about their experience.
Guest reviews
5.0/10
based on 5 reviews
4.5/5 based on 670 reviews
9.2
9.2/10 based on 344 reviews
#7 of 20 hotels in Lassi based on Tripadvisor
Elijah
United Kingdom, February  2025
6.2/10

Thalassa Boutique Hotel was a beautiful getaway with stunning sea views and lovely communal areas. though my room had some issues that detracted from the experience. The staff were exceptionally friendly and attentive, which added a personal touch to my stay. While the dining options, especially breakfast, were mostly good, some meals could use improvement.

Rooms
7.0
My room was spacious and clean, providing jaw-dropping views of the sea. but the bed was not comfortable, and I noticed some maintenance issues that needed addressing.
Service
9.0
Every member of the Thalassa team was friendly and eager to assist. making a noticeable difference during my stay.
Location
8.0
The hotel is perfectly situated close to beautiful beaches and within walking distance to local tavernas. However, there was some noise from construction nearby during my visit.
Dining
7.0
Breakfast offered a great selection of delicious local items. yet some dinner options didn't impress as much as I had hoped.
Facilities
8.0
The pool area was fantastic, with plenty of sun loungers available for relaxation. but the Wi-Fi was spotty in my room.
Steven
United Kingdom, January  2025
5.2/10

I had a lovely two-night stay at Thalassa Boutique Hotel. The breakfast was truly excellent with a variety of fresh options, and I appreciated the beautiful pool area, beautifully decorated and clean. However, I faced some challenges as there was no elevator for my large suite on the first floor, which made hauling my bags a bit of a workout. Additionally, the construction nearby was a bit disruptive and blocked part of the sea view.

Rooms
7.0
My suite was large with great views, but I struggled with the stairs since there aren't any elevators. The room had a comfortable setup, though it had a musty odor at times.
Service
9.0
The staff were super friendly and attentive, making my stay more enjoyable. They helped with any of my queries promptly and were genuinely welcoming.
Location
8.0
The hotel is in a fantastic location, close to lovely beaches and a short trip into Argostoli. I could easily get to other dining options nearby, which was handy.
Dining
7.0
Breakfast was a highlight with a wide selection and friendly service. However, I found some of the dinner options repetitive and a bit pricier than expected, especially the side dishes.
Facilities
8.0
The pool area was beautiful and inviting, but the surrounding grass needed some care. I enjoyed the new pool bar and the accessible facilities, aside from the ongoing construction.
Camila
United Kingdom, January  2025
7.2/10

I had a fantastic stay at Thalassa Boutique Hotel, enjoying clean and modern rooms. the stunning sea views were a highlight. The pool area was inviting and well-furnished, plus the staff consistently provided attentive and friendly service. On the downside, the food options at the restaurant could be improved for simplicity, and the area below the hotel was under construction, which detracted a bit from the beauty of the stroll to the beach.

Rooms
8.0
I stayed in a spacious Superior Double room that offered stunning views. it felt modern and very comfortable. The only issue was that some of the lower-end rooms might not be as appealing.
Service
10.0
The staff were friendly and consistently helpful. I felt welcomed throughout my stay, making it easy to ask for assistance whenever I needed it.
Location
8.0
The hotel is ideally located. just a short walk to both a larger beach and the lively Lassi strip. However, the area below was under construction, which may affect the view during the walk.
Dining
8.0
The breakfast was impressive, filled with fresh and tasty options. but I found the restaurant menu a bit too complex and lacking simpler dishes for lunch and dinner.
Facilities
9.0
The pool area was beautifully designed with comfortable loungers. and the cocktail bar was a lovely spot to unwind with a drink, though I wish there were more accessibility options in the pools.
George
United Kingdom, December  2024
5.6/10

My stay at Thalassa Boutique Hotel was lovely, but there were a few hiccups. The stunning sea views and beautifully maintained rooms really enhanced my experience, yet some service aspects, especially at the restaurant, could improve. Overall, I enjoyed my time here, but I faced challenges that affected my stay.

Rooms
8.0
The room was modern and well-decorated, though I experienced issues with inconsistent hot water and uncomfortable pillows.
Service
6.0
While the staff was generally friendly and attentive, my experience with wait times during breakfast and drink orders fell short of expectations.
Location
9.0
The hotel is ideally located within walking distance to great beaches and local restaurants, making exploration easy and enjoyable.
Dining
7.0
Breakfast offered a wonderful variety, but some of the dinner menu items were not as appealing and could benefit from simpler options.
Facilities
8.0
The pool area was beautiful and inviting, but I noted the need for more shade options during hot days.
Joseph
United Kingdom, December  2024
6.2/10

My stay at Thalassa Boutique Hotel was a mixed experience. The pool area was fantastic, with comfortable loungers and a lovely ambiance. However, the room I initially received was not up to scratch, and the air conditioning was noisy, which impacted my comfort. Overall, the hotel's strengths in service and location were overshadowed by the room allocation issues I encountered.

Rooms
6.0
I found the room quality inconsistent; my first room was not adequate and took too long to resolve. The lack of air conditioning control was another downside.
Service
9.0
The staff, especially Mohammed at breakfast, were incredibly friendly and eager to help, which really made a difference during my stay.
Location
9.0
The hotel's location was excellent, just a short walk to the main strip and close to some nice beaches, providing a peaceful retreat.
Dining
7.0
Breakfast was enjoyable, with a good selection, though I would have liked more options for late diners.
Facilities
8.0
The pool area was well-maintained and inviting, plus the option of ordering snacks while lounging was a nice touch.
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Property information and rules
Check-in
from 15:00-23:30
Check-out
from 01:00-11:00
Guest Parking
Private parking is possible on site for free.
Internet
is available in for free.
Breakfast
At the hotel Thalassa Boutique - Adults Only guests are invited to a full breakfast served for free. 
Children & extra beds
There are no extra beds provided in a room. 
Pets
Pets are allowed on request.
Year renovated:
2006
Number of rooms:
55
Former name
thalassa (adults only)
FAQs
About Thalassa Boutique Hotel - Adults Only
What is the distance from Thalassa Boutique Hotel - Adults Only to Makris Gialos beach?
The hotel is located 500 meters from Makris Gialos beach.
What time can I check in and check out at Thalassa Boutique Hotel - Adults Only?
Check-in is at 15:00 and check-out is at 11:00.
Does Thalassa Boutique Hotel - Adults Only offer free parking?
Yes, there is free private parking available on-site without the need for a reservation.
Is there a fitness center available at Thalassa Boutique Hotel - Adults Only?
The hotel features a fully equipped fitness center for guests.
What dining options are available at Thalassa Boutique Hotel - Adults Only?
The hotel includes an on-site restaurant serving Mediterranean cuisine and a lounge bar for drinks and light meals.
Does Thalassa Boutique Hotel - Adults Only provide airport transportation?
The hotel offers a free airport shuttle service, while airport pick-up and drop-off are available for a fee.
What special amenities does Thalassa Boutique Hotel - Adults Only provide for adults?
The hotel operates as an adults-only property, promoting a tranquil and romantic atmosphere.
What can I expect for breakfast at Thalassa Boutique Hotel - Adults Only?
Guests can enjoy a rich breakfast featuring homemade delicacies and traditional Greek flavors.
What room amenities are offered at Thalassa Boutique Hotel - Adults Only?
Rooms are equipped with air conditioning, a safety deposit box, satellite TV, tea and coffee-making facilities, and marbled bathrooms.
How far is Thalassa Boutique Hotel - Adults Only from Kefalonia Airport?
The hotel is located 10 km from Kefalonia Airport.
What features do the pools at Thalassa Boutique Hotel - Adults Only have?
The hotel has two seasonal outdoor pools surrounded by lush Mediterranean gardens.

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Check-in
31Dec2025Select date
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01Jan2026Select date
Rooms and Guests2 Guests, 1 Room

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Thalassa Boutique Hotel - Adults Only Argostoli  Exterior photo

Thalassa Boutique Hotel - Adults Only

9.2
Perfect344 reviews
2.0 km from center
160 US$
178 US$
per night
Mobile-only price