Half-Day Boat Tour Kleftiko Milos: Swim in crystal caves

What makes Kleftiko worth the boat ride instead of the beach you're already on?

You board a traditional wooden boat at Agia Kiriaki and sail four hours past volcanic cliffs to Kleftiko, where you swim and explore caves for an hour. A second swim stop at Gerakas Bay follows. The boat provides shade or sun, and includes water, coffee, raki and homemade appetizers throughout. You're back by early afternoon.

Step-by-step itinerary

Boat tour to Kleftiko and Gerakas

• Start from Agia Kiriaki beach
• Sail past Gerakas, Tsigrado, Firiplaka, Gerontas
• Swim and explore Kleftiko for one hour
• Enjoy local treats and drinks on board
• Swim at Gerakas Bay for 30 minutes
• Relax on upper deck in sun or shade

The experience

The wooden boat rocks gently as it pulls away from Agia Kiriaki beach on the southern edge of Milos, and within minutes the island's road-accessible part disappears behind you. What opens up instead is the part most visitors never see. A coastline carved by volcanic activity into formations that have no names on any map, just colors: rust-red cliffs, pale stone arches, water so clear you can see the seabed twenty meters down. The boat moves slowly enough that you can watch the geology unfold, and the crew points out Geraka, Tsigrado, Firiplaka as you pass, each one a different shape of erosion.

The first real stop is Kleftiko, and you get a full hour there: long enough to actually swim into the caves instead of just floating past them. The water is cold and shockingly transparent, and the caves themselves are deep enough that you lose the sun for a moment when you swim inside. Some people stay on the upper deck in the shade with a coffee. Others jump in within five minutes. After an hour, the boat moves to Gerakas Bay for a second swim, this one shorter, about thirty minutes, and by then the crew has brought out the homemade treats (small savory things with the taste of the island), plus local raki if you want it. Water, iced tea, and frappe are there the whole time, included, which matters when you're on the water for four hours with no other option.

The boat itself is traditional wooden, which means it moves at a pace that lets you actually look at things instead of just passing them. Groups stay small, and the whole experience feels less like a tour and more like someone's boat happened to have space. If you don't have a car, shared transfers run from several villages around the island (Adamas, Pollonia, Plaka), for 20 to 30 euros per person, paid to the driver in cash, and the crew can arrange that when you book.

What’s included

• Your four hours include two swim stops (one hour at Kleftiko's caves and thirty minutes at Gerakas Bay) plus complimentary water, iced coffee, iced tea, local raki, and homemade appetizers served on board.
• The boat departs from Agia Kiriaki beach and sails past four other volcanic formations along the way.
• If you need transport from your hotel or village, shared transfers are available for 20–30 euros per person, arranged when you book.

Before you book

Days and timesNext departure: 1 Jun 2027

Book up to10h before

AgesAdult (13 to 90 years) · Child (2 to 12 years) · Infant (under 2): free

GroupUp to 118

Live guideEnglish

Meeting point and pickupNo hotel pickup: you go to the meeting point. Ends back at the starting point.

Cancellation and refundsFree cancellation up to 24 h before the start. After that, no refund.It may be canceled due to bad weather or if the minimum number of travelers isn't reached. If that happens, you're offered another date or a refund.

Prices and times updated 21 days ago

Good to know

Low physical effortPets welcomeInfants must sit on laps

Operated by Let's Book Travel

Is this one for you?Right for travelers staying in Milos without a car who want to see the island's volcanic south coast and swim in caves. The boat handles the access that roads don't have. Expect four hours on the water with two swim stops and time to relax between them.

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Top questions

Can children come?

Yes. Ticket types: Child (2 to 12 years); Infant (under 2): free.

What happens if it rains?

It may be canceled due to bad weather. If that happens, you're offered another date or a refund. Free cancellation up to 24 h before the start.

How long is the boat tour to Kleftiko from Milos?

Four hours total, with one hour at Kleftiko for swimming and cave exploration, and about thirty minutes at Gerakas Bay.

Where does the boat depart from?

Agia Kiriaki beach on the southern part of Milos island.

What's included in the price?

Water, iced coffee (frappe), iced tea, local raki, and homemade appetizers. All fees and taxes are included.

Can I get a transfer to the boat if I don't have a car?

Yes. Shared transfers are available from Adamas (20 euros), Pollonia (30 euros), Plaka (28 euros), and several other villages. Pay the driver in cash and let the crew know when booking.

Is the boat shaded?

The upper deck has both sun and shaded areas, so you can choose where to sit between swims.

What are the caves at Kleftiko like?

Crystal-clear water surrounds sea caves you can swim into. The area is only accessible by boat, not by road.