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

Welcome to Thalassa Boutique Hotel - Adults Only – Argostoli (Kefalonia)

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From178US$ /night
Check-in
09Jun2026Select date
Check-out
10Jun2026Select date
Rooms and Guests2 Guests, 1 Room
Key details

About the Hotel

Lassi, Argostoli (Kefalonia), Greece, 28100
-
Close to Makris Gialos Beach
Perfect
9.2
9.2
/10
4.8
4.5
/5

Loved by Thalassa Boutique Hotel - Adults Only guests

  • Spacious rooms
  • Attentive staff
  • Delicious meals
  • Comfortable sunloungers
"Our swim up room was glorious.food was great, staff were great."
Chloe from United Kingdom
read full review
"The pool area is perfect. Great double sun beds. Kept immaculate and clean."
thewallsonvacation
read full review
"Fantastic food, not only the sumptuous breakfast buffet that's included, but also the lunches and dinners a la carte."
Richard
read full review

4-star Adults-Only Boutique Hotel in Lassi, Kefalonia

Seaside Location

Thalassa Boutique Hotel is strategically located just 500 meters from Makris Gialos Beach, providing guests with quick access to one of Kefalonia's most beautiful shores. Set above Paliostafida Beach, the hotel offers stunning views of the bay, allowing guests to appreciate the beauty of the Ionian Sea. This location places the hotel within easy reach of the vibrant Argostoli, the island's capital.

Luxury Rooms & Suites

The hotel comprises 70 stylish rooms and suites, each featuring unobstructed views of the sea or gardens. Among these accommodations, the newly designed Swim-Up rooms offer shared access to a private pool, enhancing the guest experience. All rooms are carefully designed with modern comforts, ensuring a restful stay.

On-Site Dining

Dining at the Thalassa Boutique Hotel includes a homemade buffet breakfast featuring fresh ingredients sourced from the hotel's organic farm. The Eolia Pool Lounge serves a range of Greek delicacies and cocktails, offering spectacular views while guests unwind. In the evening, the Alaia Lounge Bar provides a cozy atmosphere for enjoying crafted cocktails as the sun sets over the sea.

Wellness & Fitness

The hotel features a fully equipped fitness center with Technogym equipment, allowing guests to maintain their workout routines. A dedicated massage room is available for personalized treatments aimed at relaxation. With two freshwater swimming pools, guests can enjoy leisurely swims or lounge by the poolside in a serene setting.

Pet-Friendly Policies

Thalassa Boutique Hotel welcomes guests traveling with pets, providing a pet-friendly environment for an inclusive vacation experience. The hotel's lush gardens and designated pet-friendly areas allow for enjoyable walks and social interactions. Specific services for pets help ensure their comfort during the stay.

Highlights

Location: 500m from Makris Gialos Beach

Rooms: 70 stylish rooms and suites with sea views

Dining: Eolia Pool Lounge serves homemade Greek delicacies

Wellness: Fully equipped fitness center with Technogym machines

Pet-Friendly: Welcomes pets with dedicated areas and services

Must-do experiences

  • Stroll through the charming streets of Argostoli's vibrant square.
  • Savor fresh seafood at the waterfront Taverna O Vasilis.
  • Visit the Korgialenios Historical and Folklore Museum for culture.
  • Take an evening walk at the De Bosset Bridge for stunning sunsets.
  • Explore the local market for authentic Kefalonian delicacies.
View all

Select your room type

Choose from doubles, suites, or family rooms, many with breakfast, flexible cancellation, and promotional rates
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
Show all rooms
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Price and Room Availability Calendar

Check availability and prices for your dates now!

Facilities

Boutique hotels design their amenities with your relaxation and unique travel experiences in mind
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

Thalassa Boutique Hotel - Adults Only offers a delightful culinary experience with a focus on Mediterranean flavors. Guests can immerse themselves in the local cuisine while enjoying stunning sea views and a relaxed atmosphere, ensuring every meal is a celebration of taste and culture.
Thalassa Boutique Hotel - Adults Only Argostoli Restaurant photo

Thalassa Restaurant

Mediterranean
Ambiance
Nestled within the hotel, Thalassa Restaurant offers serene views of the sea, providing a relaxed setting that harmoniously blends with the tranquil environment of the hotel.
Key Offerings
Savor local delicacies, creative Greek dishes featuring fresh meat and fish, Kefalonian cheeses, and freshly made desserts. Each bite tells a story of the region's rich culinary heritage, making for an indulgent afternoon.
Reservation
Not needed
Open for lunch from 14:00 to 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)
Activities Near Thalassa Boutique Hotel
Top Attractions
Activities
Dining
Entertainment
Makris Gialos Beach
Makris Gialos Beach
10 minutes' walk
A stunning beach known for its soft sand and clear blue waters, perfect for sunbathing and swimming.
Casa Rossa
Casa Rossa
9 minutes' walk
This iconic red villa showcases Italian architecture and offers a glimpse into the area's history.
Argostoli Harbour
Argostoli Harbour
25 minutes' walk
A picturesque waterfront with restaurants and shops, ideal for leisurely strolls especially during sunset.
Bridge De Bosset and its Monument
Bridge De Bosset and its Monument
10 minutes' drive
The longest stone bridge in Europe features stunning views and is rich in cultural history and local lore.
Snorkeling at Platis Gialos Beach
16 minutes' walk
Experience vibrant marine life with local snorkeling rentals available for all skill levels.
Yoga by the Beach
12 minutes' walk
Relaxing yoga sessions offered at nearby beaches, perfect for guests seeking tranquility and wellness.
Hiking in Mount Ainos
30 minutes' drive
Thrilling hikes with stunning panoramic views await at this national park, ideal for adventure enthusiasts.
Tzogias Taverna
Tzogias Taverna
9 minutes' walk
Traditional Greek dishes served in a cozy setting; try the moussaka and enjoy local wines.
Butler's House
Butler's House
10 minutes' walk
A charming spot offering a mix of Mediterranean and international cuisine with lovely outdoor seating.
Aqua Marina
Aqua Marina
7 minutes' walk
Fresh seafood and casual ambiance; the grilled octopus is a must-try here.
Lassi Beachside Bars
12 minutes' walk
Vibrant bars with live music and beach vibes, perfect for enjoying cocktails during sunsets.
Cine Luxor Argostoli
10 minutes' drive
A charming outdoor cinema offering evening screenings of both classic and recent films under the stars.
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
Looking for special rates when booking early?
Explore them with us!
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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
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

Real comments from travelers who have already stayed
Review summary
Based on recent reviews
Powered by AI
Thalassa Boutique Hotel offers a lovely experience with immaculately clean and spacious rooms, some featuring gorgeous double sinks and showers. Guests frequently mention the delicious breakfasts with so much choice, as well as the comfortable sunbeds by the two pools. While the hotel generally receives high praise, a few guests have noted that the shower in their rooms could be updated. It is also conveniently located within walking distance to sandy beaches and a short walk to Lassi main road.
Show moreShow less
Review score
Based on 342 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
Clean rooms
Friendly staff
Great breakfast
Swim-up pool
Sea view
Cons
Construction noise
Guest reviews
based on 342 reviews
9.1/10
based on 670 reviews
4.5/5
based on 361 reviews
9.2/10
Samuel from United Kingdom
Couple
Deluxe Double Room
5 nights in October 2025
|
Reviewed: January 10, 2026
9/10
excellent roomgood areadelicious dish
I have stayed for several nights. the hotel facilities presents excellent room maintenance. the poolside area felt good and i appreciated the restaurant. Plenty of delicious dish choices exist.
I had a slightly negative experience with one receptionist. They are less engaging.
0 Helpful
Charlotte from United Kingdom
Couple
Superior Double or Twin Room
5 nights in November 2025
|
Reviewed: January 03, 2026
9.3/10

lovely stay

adult aspectionian seahelpful staffpool shade
the adult only aspect was wonderful. the views of the ionian sea are fabulous. the staff are genuinely nice and helpful. they worked tirelessly to.
i noticed little shade around the pool area. i think some additional umbrellas would be beneficial.
Location
9/10
the hotel is located 15 minutes from the airport. it is also a short walk to a main area. the hotel offers easy access to local attractions and amenities.
Dining
10/10
breakfast was excellent with ample choice. all options seemed freshly prepared. the breakfast area have fine views. it made each morning very pleasant.
Facilities
9/10
the pool area has lots of sun beds. it is furnished to a high standard with sofas. the rooms are large and well equipped. i had everything i needed.
0 Helpful
|
Show more
Aiden from Ireland
Couple
Deluxe Double Room
4 nights in November 2025
|
Reviewed: December 16, 2025
9.2/10

was so great

comfortable bedsfriendly staffunprofessional experience
the pool is lovely with sunbeds available i particularly enjoyed the double beds they are very comfy. staff members are very great it. i stayed in a beautiful room it was super clean and comfortable with a gorgeous double sink and shower.
before my arrival i sent an email asking for recommended restaurants nearby but i never received a response. i expected a much higher level of service attention and respect . sadly this experience was disappointing.
Dining
9/10
breakfast was delicious and the seating area had a lovely sea view which was a great way to start the day. the hotel restaurant had amazing dinners with excellent service.
Service
10/10
staff members displayed amazing energy and were always so positive and happy to help . the staff are efficient very great.
Facilities
9/10
the pool area has many sunbeds we really enjoyed the double beds. you can also get food and drinks brought to you while you're around the pool. the hotel also has car parking which is good.
Rooms
10/10
the rooms are spacious and clean providing a comfortable environment. the beautiful room included a double sink and shower both were gorgeous. the beds were also comfortable.
Location
8/10
the hotel is in a good location only a short walk to shops and restaurants. it is also very close to a couple of beaches. getting a car is recommended to explore the rest of the island.
0 Helpful
|
Show more
William from United States
Single
Deluxe Double Room
5 nights in October 2025
|
Reviewed: November 07, 2025
7/10
friendly staffspacious roomsgreat air conditioninglittle shadepricey restaurantpoor pool access
The staff was very friendly and helpful. The rooms were immaculate and spacious. I found the air conditioning to be great in my Beautiful Double Room.
There was very little shade around the pool. The restaurant was a little pricey for what I got, I felt. Access in and out of the two pools was not great.
0 Helpful
Luke from Australia
Couple
superior double or twin room
5 nights in August 2025
|
Reviewed: November 05, 2025
9.3/10

really good experience!

wide selectionamazing foodattentive staffsmall bathroom
the staff was kind and helpful, from reception to housekeepers. breakfast included a wide selection with a local take. i enjoyed the poolside bar and restaurant where the food tasted amazing! the waiters and bar staff spoke good english and were professional and attentive.
my bathroom was the smallest one i've ever seen in a hotel and might not suit everyone. other guests said their bathrooms were fine, so it may have been specific to our wing. i will try to get the swim-up rooms next time for sure!
Facilities
9/10
the hotel features well-designed indoor and outdoor spaces! the main pools are beautiful and provide a relaxing atmosphere. guests can enjoy shared pools with certain rooms, so cool
Dining
10/10
the restaurant serves amazing food! the breakfast offers various choices, and fresh pastries appear every morning, so yummy! the staff is accommodating and helps guests with dietary needs too
Location
9/10
the location is great, with some of the best beaches a short walk away! it's near costa costa beach! argostoli is also a short drive away, offering shopping and restaurant options, that's very convenient
0 Helpful
|
Show more
Oliver from United Kingdom
Couple
Suite Sea View
5 nights in August 2025
|
Reviewed: November 04, 2025
9/10
fresh pastriescomfortable sunbedsattentive service
the breakfast buffet featured many choices. pastries were delicious there. Fresh fruit juices were also available. The pool area includes many sunbeds.. those are very comfortable. The bar provided attentive service near the pool.
access in and out of the bigger of the two pools is somewhat difficult.
0 Helpful
Logan from United States
Single
Deluxe Double Room
5 nights in August 2025
|
Reviewed: October 03, 2025
9/10

Adults-Only Retreat, A Peaceful Experience

lovely beachsuperb groundsconvenient location
I enjoyed the convenient proximity to a lovely beach, approximately 400 meters away. Loretta was fabulous, delivering my coffee every morning with a smile. The grounds of the hotel were superb. I enjoyed the overall location.
0 Helpful
FAQs
About Thalassa Boutique Hotel - Adults Only
What is the check-in and check-out policy at Thalassa Boutique Hotel - Adults Only?
Check-in is available from 15:00 and check-out is by 11:00.
How far is Thalassa Boutique Hotel - Adults Only from the nearest beach?
The hotel is located just 300 meters from Makris Gialos beach.
What dining options are available at Thalassa Boutique Hotel - Adults Only?
The hotel has an on-site restaurant serving Mediterranean cuisine and an Alaia Lounge Bar for drinks and light meals.
What room amenities can guests expect at Thalassa Boutique Hotel - Adults Only?
Rooms are equipped with air conditioning, a TV with satellite channels, a safety deposit box, and tea/coffee-making facilities.
What is the distance from Thalassa Boutique Hotel - Adults Only to Kefalonia Airport?
The hotel is approximately 10 km away from Kefalonia Airport.
How far is Thalassa Boutique Hotel - Adults Only from Argostoli city center?
The hotel is located 1 km from the center of Argostoli.
What types of breakfast are offered at Thalassa Boutique Hotel - Adults Only?
The hotel serves a rich breakfast featuring homemade delicacies and traditional Greek flavors.
Can guests access free Wi-Fi at Thalassa Boutique Hotel - Adults Only?
Yes, free Wi-Fi is available throughout the hotel.

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Rooms and Guests2 Guests, 1 Room
  • Overview
  • Rooms
  • Price calendar
  • Facilities
  • Location
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