Thalassa Boutique Hotel - Adults Only, Argostoli (Kefalonia) ➤ Reviews, Rooms & Prices 2026

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Thalassa Boutique Hotel - Adults Only Argostoli Exterior photo

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Key details

About the Hotel

Lassi, Argostoli (Kefalonia), Greece, 28100

Close to the beach

Perfect

9.2

/10

4.8

4.5

Loved by Thalassa Boutique Hotel - Adults Only guests

Perfect location
Helpful staff
Fine views
Spacious rooms
Delicious food
Warm welcome

"Our swim up room was glorious.food was great, staff were great."

Chloe from United Kingdom

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"The breakfast area enjoyed spectacular views of the sea and mountains, providing a great selection of food suitable for all palates."

Lisa G from United Kingdom

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"The hotel restaurant served excellent food and drinks and the view of the sea from the hotel is amazing."

Sharon

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

Luxurious Accommodation

Thalassa Boutique Hotel offers 70 stylish rooms and suites, accommodating up to 2 guests each. The Deluxe Suite Sea View provides spacious living with panoramic views of the Ionian Sea. Additionally, the newly arrived Deluxe Swim-Up rooms feature direct access to a private shared pool, creating a unique experience.

Exceptional Dining

The Eolia Pool Lounge delivers a culinary experience featuring organic ingredients sourced from the hotel's own farm. Guests can enjoy traditional Greek dishes with a modern twist alongside a curated list of local wines. Breakfast is available until 11 AM, providing a relaxed start to the day.

Stunning Location

Located 500 meters from Makris Gialos beach, the hotel sits above Paliostafida beach, providing breathtaking sea views. It maintains convenient access to Argostoli, just a 10-minute drive away. The serene surroundings allow guests to explore breathtaking beaches and local attractions with ease.

Inviting Outdoor Spaces

Two freshwater swimming pools are surrounded by lush Mediterranean gardens, offering an ideal space to relax. Guests can lounge under olive trees or enjoy drinks at the pool bar. The outdoor ambiance invites relaxation and socializing.

Wellness and Fitness

A fully equipped fitness center allows guests to maintain their workout routines while enjoying views of the garden. The hotel also offers a massage room for relaxation after an active day. Guests can engage in wellness activities while nestling among the Mediterranean landscape.

Highlights

Location: 500 meters from Makris Gialos beach

Rooms: 70 stylish rooms and suites

Dining: Eolia Pool Lounge with organic ingredients

Wellness: Fully equipped fitness center

Outdoor: Two freshwater swimming pools

“This adults-only boutique hotel crafts an intimate atmosphere near Kefalonia's beaches. The pools are framed by lush gardens, perfect for tranquil days. Expect curated experiences here, where local flavors meet luxury.”

Anna BlackEditor-in-Chief at Tohotel

Location: Great

8.9/10Review score

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Highlights from guests

DiningFoodie Heaven

Breakfast was a feast! The buffet had so much choice, always fresh and delicious, with something for everyone. Also, the moussaka was exceptional.

Ricardo from Spain

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Room FeaturesLuxury Defined

The room was spacious and modern, with a sunny balcony and stunning sea views. New towels and complimentary water were provided daily.

Mei from China

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BathroomSpa Experience

The large walk-in shower was excellent. Some rooms have a jacuzzi bath. Toiletries were replaced when necessary.

Rajesh from India

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Spa & LeisurePoolside Bliss

Two spotless pools had lots of space. Sunbeds were comfy and had deep cushions. Clean, fresh towels are provided daily.

Isabelle from France

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Select 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

2 persons

305 sq. feet

1 Double bed

Heating

Balcony

room details

Superior Double or Twin Room Garden View

2 persons

325 sq. feet

1 Double bed

Heating

Balcony

room details

Deluxe Double Room

2 persons

305 sq. feet

1 Double bed

Heating

Balcony

room details

Suite Sea View

2 persons

305 sq. feet

1 Double bed

Heating

Balcony

room details

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Price and Room Availability Calendar

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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
Free 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

Dining Onsite

At Thalassa Boutique Hotel - Adults Only, dining transcends mere meals, presenting guests with a medley of Mediterranean flavors and local delicacies. Enjoy sun-drenched lunches and delightful breakfasts in a setting that embraces the stunning sea views, where every bite tells a story of authenticity and culinary artistry.

Thalassa Boutique Hotel - Adults Only Argostoli Restaurant photo

Thalassa Restaurant

Mediterranean

Ambiance

With a serene atmosphere and breathtaking sea views, Thalassa Restaurant offers a relaxed yet elegant dining experience, perfectly complementing the hotel's luxurious setting.

Key Offerings

Indulge in a selection of local delicacies, ranging from freshly caught fish to savory meats, accompanied by exquisite Kefalonian cheeses and sumptuous desserts. Lunch is a leisurely affair, allowing guests to take their time and savor each moment.

Reservation

Recommendations for reservations are not specified.

Open for lunch daily from 14:00 to 16:00.

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)

Experience Lassi: Activities & Dining

Makris Gialos Beach

10-minute walk

Golden sands and crystal-clear waters make this beach ideal for sunbathing and swimming.

Casa Rossa

9-minute walk

A historic mansion that captivates with its architecture and scenic views, perfect for a leisurely visit.

Bridge De Bosset and its Monument

10-minute drive

This iconic bridge offers stunning views and historical significance, great for a quick photo op.

Argostoli Harbour

5-minute drive

A bustling harbor area filled with shops and cafes, perfect for relaxing and enjoying the seaside atmosphere.

Water Sports at Platis Gialos

16-minute walk

Thrilling water sports like jet skiing and parasailing offer an adrenaline-filled day at the beach.

Yoga Classes

10-minute walk

Relaxing yoga sessions by the sea provide tranquility and wellness amidst the beautiful scenery.

Tzogias Taverna

9-minute walk

Traditional Greek food in a cozy setting, known for its moussaka and fresh seafood.

Aqua Marina

7-minute walk

A vibrant atmosphere with Mediterranean dishes and stunning views from the terrace.

Butler's House

10-minute walk

Intimate dining with gourmet cuisine, offering a farm-to-table experience and elegant ambiance.

Kefalonia's Nightlife

5-minute drive

Bars and clubs with live music create a lively nightlife scene ideal for all ages.

Local Festivals

10-minute drive

Seasonal cultural events feature local music, dance, and cuisine for a family-friendly experience.

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

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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:

Former name

thalassa (adults only)

Reviews and Ratings

Feedback about Thalassa Boutique Hotel - Adults Only from previous guests about their experience.

Review summary

Based on recent reviews

Thalassa Boutique Hotel offers a delightful adults-only experience with spacious and very clean rooms. Guests consistently praise the beautiful pool area, highlighting the convenience of two swimming pools and ample sunbeds. The hotel's location is ideal for exploring Kefalonia, being a short walk from Gialos beach and within easy reach of Argostoli; some rooms feature stunning sea views. While the hotel generally earns high marks, a few guests have mentioned occasional delays when waiting for drinks at the pool bar.

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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

Comfortable room

Beautiful garden

Accommodating staff

Good breakfast

Clean rooms

Cons

Construction site

Slow service

based on 670 reviews

4.5/5

George from United States

Couple

Deluxe Double Room

5 nights in August 2025

Reviewed: October 23, 2025

9.5/10

Fantastic Stay, Super clean Rooms, Delicious Food!

lovely bedsgreat restaurantattentive staffclean room

I loved the pools and comfy beds. The restaurant and bar areas were wonderful. The bar overlooks the sea. The breakfast was spot on. The staff are lovely and attentive. Rooms were really clean and offer good facilities, I found that very comforting.

Facilities

9/10

Two lovely pools offered plenty of very comfy sunbeds and brollies. Fresh towels were available every day. The fabulous gym includes modern equipment for a complete workout. There's also a great pool bar and restaurant.

Location

9/10

The hotel location is convenient, offering only a short walk into lassi. There are many restaurants and shops close by, and a couple of different beaches too. The hotel provides car parking, this is good if you plan to explore.

Dining

10/10

Breakfast was delicious and provided a good mix of options, this included excellent views. The restaurant had plenty of choice with delicious dishes.

Service

10/10

The staff are very friendly and helpful. I really liked that they were attentive. The hotel staff helped me program my trip in kefalonia. They advised me about local beaches and restaurants.

0 Helpful

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Paul from United Kingdom

Couple

Deluxe Double Room

4 nights in August 2025

Reviewed: September 26, 2025

9.3/10

Absolutely Fantastic Stay!

friendly staffdelicious breakfastfantastic showerpoor lighting

This adults-only hotel was so nice! I found the staff friendly. The breakfast buffet was delicious with many fresh, local options. Our room was spacious with a fantastic shower (the water pressure was amazing!). I especially enjoyed relaxing by the pool.

The lighting in the path from the hotel to the nearest village was poor, made night walks less safe and more stressful.

Service

10/10

The service was great with every staff member eager to assist and provide a nice experience. Their attentiveness made everything smooth. They seemed genuinely happy to helpwith a warm atmosphere. I especially remember how quickly they solved a small issue I had (it was about the AC).

Location

9/10

The hotel enjoys a superb setting near the coast and within easy reach of local attractions. Its location allowed for both relaxation and exploration. Access to the beach and nearby dining options was convenient.

Rooms

9/10

The rooms were well-appointed with modern amenities. The cleanliness and comfort were apparent. The design was sleek and functional (I thought it was very stylish). the room provided a relaxing space to unwind after a day of exploring.

Facilities

9/10

The hotel boasts a well kept pool area, a restaurant, and other amenities designed for relaxation. I appreciated the attention to detail in maintaining these areas. The gym facilities were adequate for a quick workout, and the pool area provided a tranquil escape.

0 Helpful

Ellen from Germany

Couple

Suite Sea View

4 nights in August 2025

Reviewed: September 24, 2025

9.3/10

Amazing Stay! Totally Recommend!

spacious roomslocal pastriesmany loungersavailable loungers

This hotels rooms felt so spacious. Air conditioning worked wonderfully! Breakfast had many options. I enjoyed trying local Greek pastries. I loved spending the day by the pools. Plenty of loungers were available, even late morning.

I noticed the gym only has limited equipment, but its okay.

Facilities

9/10

There are two kidney-shaped pools, so many can swim. Loungers provide adequate space. Some areas feature natural shade from trees. Umbrellas offer extra protection. The poolside bar offers convenient service throughout daylight hours.

Rooms

10/10

Rooms are spacious and include modern features. Housemaid services are fantastic. Air conditioning keeps the room cool. The beds are very comfortable too. A shower is large. The bathroom is very clean.

Location

9/10

The hotel is located near the main street, within walking distance. Quiet beaches are a short walk. Many excellent restaurants are nearby. The hotel is also close to a small market.

0 Helpful

William from United Kingdom

Couple

superior double or twin room

3 nights in August 2025

Reviewed: September 18, 2025

7/10

super clean poolsgood stafflittle shadepricey restaurant

the pools were very super clean. i found ample sun beds, also a profusion of beach towels were available for use. the food was excellent with good prices and good staff.

the key test is, would i go back? no, unfortunately not. there is very little shade around the pool and i found the restaurant a little pricey for what i get.

0 Helpful

Questions of the users

About Thalassa Boutique Hotel - Adults Only

What arrangements are in place if I happen to arrive after the standard check-in time?

12 November 2024

Check-in is available 24/7, so there's no need to worry about late arrivals. The hotel team is ready to assist you at any hour.

Is it possible to have a reliable Wi-Fi connection in my room for important work calls?

29 December 2024

Complimentary Wi-Fi is provided in all rooms, ensuring you can connect seamlessly for video calls or streaming.

Are there provisions for making coffee and tea in the rooms, and will I find pool towels available during my stay?

5 February 2025

Each room is equipped with tea and coffee making facilities, and pool towels are provided for your convenience.

What size are the double beds in the hotel rooms? Are they larger than standard?

15 March 2025

Double rooms feature king-size beds, measuring 1.80m x 2.00m, providing a spacious and comfortable sleeping experience.

Can I add an extra bed in a double room for my young child, and are there age limitations that I should be aware of?

23 April 2025

An extra bed can be requested for a child, but please specify their age, as additional charges may apply depending on this.

What is the distance from the hotel to the nearest beach, and is it easily accessible?

14 June 2024

The popular Makris Gialos beach is just 500 meters away, making it easy to enjoy a day by the sea.

Are the dining experiences provided in the hotel suitable for special dietary needs?

9 August 2025

The hotel prides itself on its cuisine, with a variety of options available. Guests with dietary restrictions are encouraged to communicate their needs to ensure a delightful dining experience.

How can I arrange transportation from the airport to the hotel upon my arrival?

30 September 2024

Free private transfers from Kefalonia Airport are offered for stays of seven nights or more. For shorter stays, local taxi services are available.

What types of amenities can I expect near the hotel for leisure activities or local excursions?

18 October 2025

The hotel's location allows for easy access to water sports, local shops, and attractions, with organized excursions available through the concierge.

Can I enjoy cocktails at the hotel, and what kind of ambiance does the lounge offer?

7 December 2024

Yes, the Alaia Lounge Bar serves a variety of cocktails in a stylish setting that offers stunning views of the sea, making it a perfect spot for relaxation.