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Greece
Argostoli (Kefalonia)
Thalassa Boutique Hotel - Adults Only
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Thalassa Boutique Hotel - Adults Only Argostoli Exterior photoThalassa Boutique Hotel - Adults Only Argostoli Exterior photoThalassa Boutique Hotel - Adults Only Argostoli Exterior photo
Book here and pay
10% less
than on Booking.com!
Check rooms and rates
From178US$ /night
Check-in
03Jun2026Select date
Check-out
04Jun2026Select date
Rooms and Guests2 Guests, 1 Room
Key details

About the Hotel

Lassi, Argostoli (Kefalonia), Greece, 28100
-
Steps from Makris Gialos Beach
Perfect
9.3
9.2
/10
4.8
4.5
/5

Loved by Thalassa Boutique Hotel - Adults Only guests

  • Comfortable beds
  • Fine sea views
  • Attentive staff
  • Delicious cocktails
"The pool area is stunning with views over the bay from certain sun beds."
Charlotte B from United Kingdom
read full review
"We booked B&B and the breakfast was delicious, great choice and such friendly staff."
Sarah from United Kingdom
read full review
"Fantastic food, not only the sumptuous breakfast buffet that's included, but also the lunches and dinners a la carte."
Richard from United States
read full review

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

Thalassa Boutique Hotel - Adults Only offers a variety of rooms including double rooms, family rooms, and suites with breakfast, free cancelations, and special deals
Superior Double or Twin Room
Superior Double or Twin Room
2 persons
305 sq. feet 
1 Double bed
Heating
Balcony
room details
Superior Double or Twin Room Garden View
Superior Double or Twin Room Garden View
2 persons
325 sq. feet 
1 Double bed
Heating
Balcony
room details
Deluxe Double Room
Deluxe Double Room
2 persons
305 sq. feet 
1 Double bed
Heating
Balcony
room details
Suite Sea View
Suite Sea View
2 persons
305 sq. feet 
1 Double bed
Heating
Balcony
room details
Click button to see more rooms
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Price and Room Availability

Check availability and prices for your dates now!

Facilities

Thalassa Boutique Hotel - Adults Only offers amenities for your comfortable stay and unforgettable experiences
Facilities: Perfect
9.4/10Review score

General

  • Non-smoking rooms
  • 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

Thalassa Boutique Hotel - Adults Only Location

Lassi, Argostoli (Kefalonia), Greece, 28100
Map view
Lassi, Argostoli (Kefalonia), Greece, 28100
City landmarks
Beach
Makris Gialos Beach
2600 ft
Landmark
Lassi
3300 ft
Landmark
Platis Gialos Beach
4200 ft
Landmark
Casa Rossa
2500 ft
Landmark
Bridge De Bosset and its Monument
1.5 mi
Beach
Paliostafida beach
2900 ft
Museum
Archaeological Museum of Argostoli
1.5 mi
Beach
Gradakia beach
4400 ft
Landmark
Platys Gialos
3500 ft
Landmark
Argostoli Harbour
1.4 mi
Landmark
Cave-Hermitage St. Gerasimos
3200 ft
Landmark
Bell Square
1.3 mi
Landmark
Paralia Makris Gialos
2600 ft
Landmark
Aquarius Bar
2100 ft
Landmark
So Simple Music Bar
2100 ft
Landmark
Tennis Club Argostoli
2200 ft
Landmark
Trentis' Bar
2300 ft
Landmark
Logos Grand View Cocktail/Pool Bar
2500 ft
Landmark
Kefalonia Watersports
2600 ft
Museum
Italian "Divisione Acqui" War Museum
1.2 mi
Landmark
Eden Bar
2800 ft
Landmark
Caves
2900 ft
Landmark
Paralia Platis Gialos
3200 ft
Church
Saint Spiridon Church
1.2 mi
Landmark
Kokolis Travel
3300 ft
Landmark
Korgialenio Historic and Folklore Museum
1.4 mi
Landmark
Easy Moto Rentals
3800 ft
Church
Catholic church of St Nicolai
1.8 mi
Garden
Cephalonia Botanica
1.8 mi
Nearby
Outdoor Kefalonia
1900 ft
Restaurants
Tzogias Taverna
2400 ft
Lassi
Aqua Marina
1900 ft
not known
Zorbas Restaurant
2300 ft
Main Lassi Rd
Tanu's
2200 ft
Restaurant
Butler's House
2700 ft
Lassi Aerodromiou Argostoli
Da Veronica Bar
2400 ft
Nearby Veronica's Jewellery
Da Veronica
2600 ft
Restaurant
Taverna Sirtaki
3000 ft
Main Road
Nefeli Restaurant
3000 ft
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  ·  1.2 mi
Airports
Kefalonia (EFL)10 min  ·  3.9 mi
Dionysios Solomos (ZTH)185 min  ·  76.6 mi
Access exclusive early booking discounts.
Choose your spa escape today!
Check Rates
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
Wireless 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)

Reviews and Ratings

Reviews from guests about their experience.
Review summary
Based on recent reviews
Powered by AI
Thalassa Boutique Hotel is often described as a beautiful and modern getaway, conveniently located a short walk from Lassi's main road, placing guests within easy reach of restaurants and the beach. The spacious and clean rooms come equipped with amenities like coffee machines, and some guests were welcomed with thoughtful touches such as fruit salads and wine. While the hotel is generally praised, a few guests have noted that the restaurant can be a little pricey compared to alternatives in Argostoli. The hotel boasts facilities such as well-maintained gardens, a fabulous gym, great pool bar and swimming pools, offering excellent views.
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Review score
Based on 344 verified reviews
9.1/10
Perfect
93%
Recommend
Breakfast
10.0/10
Paid Wi-Fi
10.0/10
Value for money
8.6/10
Location
8.9/10
Pros
Spacious room
Friendly staff
Delicious cocktails
Cons
Construction noise
Small gym
Guest reviews
based on 344 reviews
9.1/10
based on 670 reviews
4.5/5
based on 354 reviews
9.3/10
Melissa from Australia
Couple
Superior Double or Twin Room
4 nights in October 2025
|
Reviewed:December 21, 2025
9/10

relaxing adult retreat

attentive staffgreek cuisineexcellent sun lounge
i found the staff to be very attentive and helpful. the mediterranean breakfast buffet offered a great selection, with lovely greek cuisine. the pool area and sun lounge area were excellent i spent many days there.
Facilities
9/10
the hotel features a lovely pool area with many sun beds and comfortable seating. the restaurant offers sea views and a nice bar area. breakfast is also a great experience, with fresh options and a relaxing atmosphere.
0 Helpful
|
Show less
Nicholas from United Kingdom
Couple
deluxe double room
4 nights in August 2025
|
Reviewed:November 15, 2025
6/10
wide choicelimited shadesmall parasols
the breakfast was acceptable with a wide choice available to suit different tastes.
the pool area lacked enough shade. only about 30% of sunbeds had parasols. i had to get up early to secure a shaded spot and the parasols are small, hardly covering two sunbeds. this was really disappointing.
0 Helpful
George from United States
Couple
deluxe double room
4 nights in August 2025
|
Reviewed:November 09, 2025
7/10
sea viewcomfy bedsmall showerlimited menu
i loved the location looking out to sea. the staff were very professional and had a relaxed vibe. everything was clean and felt new, and the bed was very comfy. the food was also really good, we loved it.
i found that the shower was small and i could barely move around. we had no hot water one morning and were not informed that the boiler had broken. the menu at the snack bar was also quite limited, so we didn't eat there much.
0 Helpful
Molly from Australia
Family with children
Superior Double or Twin Room
3 nights in August 2025
|
Reviewed:September 25, 2025
5/10

Underwhelming Experience

awful furniture
I was a bit disappointed . The room was not what I was expecting. The furniture looked old, and the bed was uncomfortable. I think I will not come back to this hotel again.
0 Helpful
Nathaniel from United States
Couple
Superior Double or Twin Room
4 nights in August 2025
|
Reviewed:September 08, 2025
6/10
good varietybasic showerdifficult ladders
The breakfast offered a good variety of options. The grounds were maintained well.
The room had a few issues. The shower needed some updating. It felt a bit basic compared to the rest of the hotel. I also found the pool access quite difficult. The ladders were not very easy to use.
0 Helpful
Alfred from United Kingdom
Couple
deluxe double room
4 nights in August 2025
|
Reviewed:September 05, 2025
9.5/10

fantastic experience

amazing staffgood roomgreat areafantastic experience
I found the staff amazing and very kind. the room was good and it had many facilities. i'm looking forward to return! the pool area was great. the room was also great. A fantastic experience.
The walk to lassi took about 30 minutes, though it was manageable, the road could be better lit at night. So it's advisable to use a phone torch.
Facilities
9/10
the hotel features two pools, each kept at a temperature perfect for cooling off during the day. comfortable sunbeds were situated around the pools. the hotel provided extra umbrellas upon request.
Service
10/10
The staff members were professional and attentive. They always engaged with guests. the hotel organised boat trips. turn down service was provided. staff brought drinks to guests at the pool.
Location
9/10
the hotel is close to lassi. sandy beaches are nearby. argostoli is only a 30-minute walk. the hotel is located right outside the beach.
Dining
10/10
The hotel breakfast featured a selection of greek and continental options. Even a full english breakfast was available. the poolside bar and restaurant provides very high quality food. happy hour is available at both the pool bar and cocktail bar.
0 Helpful
|
Show more
Emma from United Kingdom
Family with children
Superior Double or Twin Room
5 nights in June 2025
|
Reviewed:July 03, 2025
9.3/10

Wonderful Stay

fresh towelsmany choicesshade issues
I found the room very clean. It had daily servicing with fresh towels. I liked that the breakfasts offered many choices. There were also more parasols, solving shade issues that previous guests had reported.
The access in and out of the two pools may represent a challenge for the slightly less able.
Dining
9/10
Breakfast includes several types of bread, fruit, vegetables, casseroles, salads, and eggs. There are also multiple options for coffee, juice, pastries, cakes, and yogurts available to guests each morning.
Facilities
9/10
The hotel offers a clean pool area. Sun loungers ensure comfort. The rooms offer spacious interiors with fantastic power showers. Ground-floor rooms face the pool, providing easy access.
Location
10/10
A beach sits approximately 400 meters behind the hotel. Sunbeds cost 15 euros. The hotel is situated near beaches. It is also close to a small center with various restaurants and a market.
0 Helpful
|
Show more
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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Rooms and Guests2 Guests, 1 Room
  • Overview
  • Rooms
  • Price calendar
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  • Location
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