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Thalassa Boutique Hotel - Adults Only

4.0 star property

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Photo gallery for Thalassa Boutique Hotel - Adults Only

Exterior
Bar (on property)
Exterior
Exterior
Reception

Reviews

9.0 out of 10
Wonderful

Popular amenities

  • Gym
  • Bar
  • 24/7 front desk
  • Pet friendly

Explore the area

View in a map
Lassi, Paleostafida Beach, Kefalonia, Ionian Islands, 28100
  • Place, Makris Yalos Beach
    ‪8 min walk‬
  • Place, Gradakia Beach
    ‪12 min walk‬
  • Place, Kalamia Beach
    ‪4 min drive‬
  • Airport, Argostolion (EFL-Kefalonia Island Intl.)
    ‪10 min drive‬

Room options

View all photos for Superior Room, Garden View

Superior Room, Garden View | In-room safe, desk, soundproofing, free WiFi

Superior Room, Garden View

10.0 out of 10
Exceptional
(1 review)
  • 301 sq ft
  • Sleeps 2
  • 1 Double Bed OR 2 Twin Beds

View all photos for Superior Room, Sea View

Superior Room, Sea View | In-room safe, desk, soundproofing, free WiFi

Superior Room, Sea View

8.8 out of 10
Excellent
(3 reviews)
  • 301 sq ft
  • Partial ocean view
  • Sleeps 2
  • 1 Double Bed OR 2 Twin Beds

View all photos for Deluxe Double Room, Sea View

Deluxe Double Room, Sea View | In-room safe, desk, soundproofing, free WiFi

Deluxe Double Room, Sea View

10.0 out of 10
Exceptional
(1 review)
  • 301 sq ft
  • Sea view
  • Sleeps 2
  • 1 Double Bed

View all photos for Suite, Sea View

Suite, Sea View | In-room safe, desk, soundproofing, free WiFi

Suite, Sea View

9.4 out of 10
Exceptional
(3 reviews)
  • 301 sq ft
  • Sea view
  • Sleeps 2
  • 1 Double Bed

View all photos for Room, Garden View (King)

Room, Garden View (King) | In-room safe, desk, soundproofing, free WiFi

Room, Garden View (King)

10.0 out of 10
Exceptional
(2 reviews)
  • 301 sq ft
  • Sleeps 2
  • 1 Double Bed

View all photos for Design Double Swim-Up Room

Design Double Swim-Up Room | In-room safe, desk, soundproofing, free WiFi

Design Double Swim-Up Room

  • Sleeps 2
  • 1 King Bed

View all photos for Design Room, Partial Ocean View (King)

Design Room, Partial Ocean View (King) | In-room safe, desk, soundproofing, free WiFi

Design Room, Partial Ocean View (King)

  • 323 sq ft
  • Partial ocean view
  • Sleeps 2
  • 1 Double Bed

View all photos for Executive Double Room

Executive Double Room | In-room safe, desk, soundproofing, free WiFi

Executive Double Room

  • 323 sq ft
  • Sleeps 2
  • 1 King Bed

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About the neighborhood

Lassi

Located in Kefalonia, Thalassa Boutique Hotel - Adults Only is a 4-minute drive from Port of Argostoli and 7 minutes from Makris Yalos Beach. .This hotel is 3.2 mi (5.2 km) from Fanari Beach and 4.9 mi (7.9 km) from Ammes Beach.

What's nearby

  • Makris Yalos Beach - 8 min walk - 0.5 miles
  • Paliostafída - 8 min walk - 0.5 miles
  • Gradakia Beach - 12 min walk - 0.7 miles
  • Platýs Gialós - 15 min walk - 0.8 miles
  • Kalamia Beach - 4 min drive - 1.4 miles

Getting around

  • Argostolion (EFL-Kefalonia Island Intl.) - 12 min drive

Restaurants

  • ‪Costa Costa - ‬12 min walk
  • ‪De Bosset - ‬4 min drive
  • ‪Olea Kouzinaki - ‬3 min drive
  • ‪ΤΟ ΔΙΑΒΑ - ‬4 min drive
  • ‪Σουβλάκια 'Ο Μεγας' - ‬4 min drive

About this property

Thalassa Boutique Hotel - Adults Only

Adults-only hotel with free breakfast and a fitness center
Thalassa Boutique Hotel - Adults Only offers 35 air-conditioned accommodations with safes and hair dryers. Rooms open to furnished balconies or patios. Flat-screen televisions are featured in guestrooms.

Rooms have partially open bathrooms. Bathrooms include bathtubs or showers and complimentary toiletries. This Kefalonia hotel provides complimentary wireless Internet access. Housekeeping is provided daily.

Recreational amenities at the hotel include a fitness center and a seasonal outdoor pool.
Make yourself at home in one of the 35 air-conditioned rooms featuring flat-screen televisions. Rooms have private furnished balconies or patios. Complimentary wireless internet access is available to keep you connected. Partially open bathrooms with bathtubs or showers feature complimentary toiletries and hair dryers.
Take advantage of recreation opportunities including a fitness center and a seasonal outdoor pool. Additional features at this hotel include complimentary wireless internet access and concierge services.
Enjoy a meal at the restaurant, or stay in and take advantage of the hotel's room service (during limited hours). Wrap up your day with a drink at the bar/lounge. A complimentary buffet breakfast is served daily from 8:00 AM to 10:00 AM.
Featured amenities include dry cleaning/laundry services, a 24-hour front desk, and a library. A roundtrip airport shuttle is provided for a surcharge (available 24 hours), and free self parking is available onsite.
A complimentary buffet breakfast is served each morning between 8:00 AM and 10:00 AM.
Thalassa Boutique Hotel - Adults Only has a restaurant on site.
Room service (during limited hours) is available.

Awards and affiliations

No Boutique Certification - This property has not received an official certification as a Boutique Hotel under the Hellenic Chamber of Hotels' Boutique Hotel certification scheme.

Property amenities

Internet

  • Available in all rooms: Free WiFi
  • Available in some public areas: Free WiFi

Parking and transportation

  • 24-hour roundtrip airport shuttle on request for a surcharge
  • Free self parking on site

Food and drink

  • Free buffet breakfast available daily 8:00 AM to 10:00 AM
  • A bar/lounge
  • A restaurant

Things to do

  • Gym
  • Library
  • Seasonal outdoor pool

Conveniences

  • 24-hour front desk
  • Safe at front desk

Guest services

  • Concierge services
  • Dry cleaning/laundry service
  • Housekeeping (daily)
  • Tour and ticket assistance

Business services

  • Meeting rooms

Outdoors

  • Garden
  • Pool loungers
  • Pool umbrellas
  • Terrace

Accessibility

  • No elevator

More

  • Smoking not allowed

Room amenities

Bedroom

  • Bedsheets provided

Bathroom

  • Bathtub or shower
  • Free toiletries
  • Hair dryer
  • Partially-open bathroom
  • Towels provided

Entertainment

  • Flat-screen TV

Food and drink

  • Electric kettle
  • Limited room service

More

  • Air conditioning
  • Desk
  • Safe
  • Soundproofed rooms

Policies

Check-in

Check-in start time: 3:00 PM; Check-in end time: midnight
Late check-in subject to availability
Minimum check-in age: 18

Check-out

Check-out before 11:00 AM

Special check-in instructions

This property offers transfers from the airport (surcharges may apply); guests must contact the property with arrival details before travel, using the contact information on the booking confirmation
Front desk staff will greet guests on arrival at the property
Information provided by the property may be translated using automated translation tools

Access methods

Staffed front desk

Pets

Pets allowed
Service animals are welcome, and are exempt from fees

Children and extra beds

Children younger than 18 are not allowed at this adults-only property; all guests 18 and older are welcome
Rollaway/extra beds are not available

Property payment types

Important information

Fees

You'll be asked to pay the following charges at the property. Fees may include applicable taxes:

  • A tax is imposed by the city and collected at the property. This tax is adjusted seasonally and might not apply year round. Other exemptions or reductions might apply. For more details, please contact the property using the information on the reservation confirmation received after booking.
  • A tax is imposed by the city: From 1 November - 31 March, EUR 3.00 per accommodation, per night
  • A tax is imposed by the city: From 1 April - 31 October, EUR 10.00 per accommodation, per night

We have included all charges provided to us by the property.

Optional extras

  • Airport shuttle fee: EUR 25 per vehicle (one-way)

The above list may not be comprehensive. Fees and deposits may not include tax and are subject to change.

You need to know

Extra-person charges may apply and vary depending on property policy
Government-issued photo identification and a credit card, debit card, or cash deposit may be required at check-in for incidental charges
Special requests are subject to availability upon check-in and may incur additional charges; special requests cannot be guaranteed
This property accepts credit cards, debit cards, and cash
Cashless transactions are available
Safety features at this property include a fire extinguisher, a smoke detector, and a first aid kit
This property has outdoor spaces, such as balconies, patios, terraces which may not be suitable for children; if you have concerns, we recommend contacting the property prior to your arrival to confirm they can accommodate you in a suitable room
Property Registration Number 0430Κ032A0030901

We should mention

This property does not have elevators
Cash transactions at this property cannot exceed EUR 500, due to national regulations; for further details, please contact the property using information in the booking confirmation
The seasonal pool will be open from April to October
Guests under 18 years old are not permitted at this adults-only property

Property is also known as

Thalassa Argostoli
Thalassa Hotel
Thalassa Hotel Argostoli
Thalassa Hotel Lassi
Thalassa Lassi
Thalassa Hotel KEFALONIA
Thalassa KEFALONIA
Thalassa Boutique Hotel Kefalonia
Thalassa Boutique Kefalonia
Thalassa Boutique
Thalassa Boutique Hotel
Thalassa Adults Only Kefalonia
Thalassa Boutique Hotel - Adults Only Hotel
Thalassa Boutique Hotel - Adults Only Kefalonia
Thalassa Boutique Hotel - Adults Only Hotel Kefalonia

Reviews

Thalassa Boutique Hotel - Adults Only Reviews

9.0

Wonderful

9.4/10

Cleanliness

9.2/10

Staff & service

8.8/10

Amenities

9.0/10

Property conditions & facilities

8.6/10

Eco-friendliness
Rating 10 - Excellent. 60 out of 93 reviews
Rating 8 - Good. 26 out of 93 reviews
Rating 6 - Okay. 2 out of 93 reviews
Rating 4 - Poor. 1 out of 93 reviews
Rating 2 - Terrible. 4 out of 93 reviews

Reviews

10/10 Excellent

Alan

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Nice quality hotel. Breakfast was lovely the room was very good indeed.
Stayed 2 nights in Sep 2025

8/10 Good

Steve

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort

Handy for Argostoli & exploring Southern Kefalonia

A really nice modern hotel, with a nice pool area. Really good restaurant (fantastic gyros!). Front desk really helpful sorting taxis and car hire (really efficient service for that!). Rooms a good size and comfortable. Only down side was that the balcony rarely had any sun on it, which made the room a bit dark as just patio doors for natural light (we had a Design King on east wing at front). Also there is a new hotel being built over the road so some noise and nearest beach therefore unusable. Should be finished in 2026. Also quite windy when we were there in September but pool area fairly sheltered (S side)
View from front (N)
Side view (E)
Side view (NE)
Pool
Stayed 6 nights in Aug 2025

8/10 Good

Michelle

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
The hotel grounds were beautiful and the architecture was impeccable. It captured the energy and essence of a true Greek island. The swim up suite was perfect for our couple getaway. There were 3 areas of improvement that could have made this an 5 star review. 1- the wasp nests that were located on the ceiling of the outdoor seating area for breakfast. (See picture and note) 2- a sewer smell that would come through the room from the drain of the shower. 3- A/C remotes were locked to slowest fan speed making it either really warm or cold in the room.
Breakfast seating area was covered in wasp nests which made eating challenging, dangerous (I’m allergic), and difficult to enjoy your meal.
Stayed 4 nights in Aug 2025

10/10 Excellent

Karmin

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort

Great stay!

This hotel was one of our favorite hotels we have stayed at in some time. Very friendly staff and the food here is amazing. They have live music some nights which was also so fun. Very comfortable spacious room with so much closet space. I would definitely come back here.
Stayed 4 nights in Aug 2025

10/10 Excellent

Mitchell

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Thalassa Boutique was the perfect resort for our stay in Kafalonia. The only amenity that would have been helpful would have been an ATM machine. A small gum would have been nice too. Overall hour 9 night, 10 day was superb.
Stayed 9 nights in Aug 2025

8/10 Good

Houssam

Liked: Cleanliness, staff & service, property conditions & facilities
Wonderful
Stayed 1 night in Aug 2025

10/10 Excellent

CINZIA

Stayed 5 nights in Aug 2025

2/10 Terrible

Michaela

Disliked: Staff & service
On check in was told swim up room I booked was not available, would not refund so we could book a swim up at another hotel (which is what we requested) so had no choice but to accept the standard room offered with no reimbursement for the difference in price. Terrible service do not book with Expedia or stay at this hotel!
Stayed 4 nights in Aug 2025

8/10 Good

Sharon

Liked: Cleanliness, staff & service, amenities, property conditions & facilities
The staff are really lovely and helpful. The hotel was clean and the pool area and restaurant were fantastic. Short walk from a few really beautiful beaches and walking distance to many restaurants in Lassi. The hotel restaurant served excellent food and drinks and the view of the sea from the hotel is amazing. While the furniture in the room was dated, it had everything I needed and was large. I especially enjoyed having a sea view and my own seating area outside. I really enjoyed my stay and hope to return some day.
Stayed 5 nights in Aug 2025

4/10 Poor

Rodney

Traveled with group, Traveled with partner
Disliked: Cleanliness, staff & service, amenities
The service from reception was extremely poor. The shower had mould in it. The bed was super hard and uncomfortable. Air con in the room hardly worked. Fridge in room didn’t get cold. Overall, very dissatisfied.
Stayed 2 nights in Jul 2025

2/10 Terrible

Corrie

Traveled with family
Disliked: Cleanliness, staff & service
We showed up to the hotel after 24 hours of travel, we had booked a swim up suite for 4 nights. We arrived and they told us we could not have the room we booked 5 weeks in advance, they gave us an old basement room for our first night. I asked them to return the difference of the room prices to us, and they bluntly said they would not return any money to us. I asked again the next day, they said they would give us a free dinner at their hotel. I said no, I want the value of the room returned, and they said no. Our service was terrible after this the entire time. The servers at the pool bar were very pleasant, the only kindness we received.
Stayed 4 nights in Jul 2025

10/10 Excellent

Justin

Stayed 7 nights in Jul 2025

10/10 Excellent

Bill

Stayed 2 nights in Jul 2025

10/10 Excellent

Yosef

Traveled with group
Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 3 nights in Jul 2025

10/10 Excellent

John J

Traveled with family
Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 4 nights in Jun 2025

10/10 Excellent

Steven

Traveled with partner
Liked: Staff & service, amenities, property conditions & facilities
Great hotel. Fantastic staff. Breakfast great. Wonderful Pool. Don't let the building work at the front put you off. You can't hear any noise at all.
Stayed 3 nights in May 2025

10/10 Excellent

Richard

Traveled with partner
Liked: Cleanliness, amenities, property conditions & facilities
What an amazing hotel. Lovely rooms that are meticulously cleaned each day and given the turn-down service at night. Fantastic food, not only the sumptuous breakfast buffet that's included, but also the lunches and dinners a la carte - all served by friendly, smiling staff. Oh and then a cocktail bar with a glorious view to start or end the night. Cannot fault it.
Stayed 8 nights in May 2025

10/10 Excellent

Paige

Liked: Cleanliness, amenities, property conditions & facilities
Beautiful hotel in a great location. The pool was gorgeous and I had an amazing view of the ocean from my room. The hotel staff were also top tier.
Stayed 3 nights in May 2025

10/10 Excellent

Jordan

Liked: Cleanliness, staff & service, property conditions & facilities, room comfort
Stayed 4 nights in Oct 2024

10/10 Excellent

Francine

Traveled with family
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Beautiful property. Hotel staff was very kind and welcoming. We would stay here again.
Stayed 4 nights in Sep 2024

6/10 Okay

Serafim

Stayed 4 nights in Sep 2024

10/10 Excellent

Callum Elliott

Traveled with partner, Traveled with family
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
Quiet, tranquil hotel with attentive and friendly staff. Beautiful room overlooking the Ionian Sea on an island which felt very safe. Highly recommended.
Stayed 7 nights in Aug 2024

10/10 Excellent

Phoebe

Traveled with partner
Liked: Cleanliness, staff & service, amenities, property conditions & facilities
We stayed here for 5 nights in July and it was amazing! The hotel is beautiful, the images online do not do it justice. It is quiet, and even in peak season was not super busy. The staff are lovely, and food and drinks are amazing. We were upgraded which was a suprise and the swim up rooms were incredible. We will definitely be staying here again! Thank you!
Stayed 5 nights in Jul 2024

8/10 Good

Jillian

Traveled with partner
Liked: Cleanliness, staff & service, property conditions & facilities
Great hotel with lovely design features. Our initial rooms aircon unit had a fixed temperature so it was like an oven at night. In such hot conditions this wasn’t great - especially when they told us the technician had fixed it and it couldn’t be amended. Only to find out that other guests could control their desired temperature. After 2 nights we had to say something and they changed our room. Everyone comments on the lack of umbrellas by the pool and it’s true - it’s ridiculous and I dont understand why they don’t do anything to resolve it. The only other challenge he is there’s nowhere for guests to shower if you have a late flight. Other than that we had a great stay. Great staff and beautiful views etc
Stayed 11 nights in Aug 2024

8/10 Good

Loan

Liked: Cleanliness, staff & service, property conditions & facilities
Stayed 3 nights in Aug 2024