Snorkeling Milos: Kleftiko, Caves & Thermal Waters

White volcanic rocks, purple cave waters, and a roofless cavern you enter by boat

Private snorkeling tour of Milos' southern coast by boat, with captain and guide in English or Greek. You choose half-day or full-day and pick your vessel size at checkout. Includes snorkeling gear, paddleboards, sea scooters, fresh food and drinks, WiFi, windproof jackets and towels. Drone photos are complimentary. Stops at Gerakas Beach's thermal waters, Tsigrado's cliff-side caves, Kleftiko's turquoise shallows and white rocks, Sikia Cave's sunlit interior, and the sulfur mines at Thiorichia.

Step-by-step itinerary

Stops and time spent at each

1. Firopotamos Beach30m
2. Kleftiko Beach3h

Private boat tour exploring Milos coast

• Start at Gerakas Beach
• Explore Tsigrado cliffs and caves
• Visit Purple Cave
• Snorkel and relax at Kleftiko
• Enter and explore Sykia Cave
• End at Old Sulfur Mines

The experience

The boat leaves from Milos and heads to five named stops along the southern coast, each one reachable only by water. Kleftiko is the signature spot: a cluster of volcanic white rocks rising from crystalline shallows, with natural caves that once sheltered Aegean pirates. You snorkel the sea bottom around them or stay aboard to eat first. Sikia Cave is a roofless chamber accessible only by boat. The captain motors through the small entrance so you can walk the beach inside or swim in the sunlit water. Tsigrado shows you a coastline of small caves carved into dramatic cliffs, unreachable from land. Gerakas Beach has thermal waters and pristine sand where you can stay as long as you want. The sulfur mines at Thiorichia end the day with yellow cliffs, abandoned mining structures, and historic ruins where thermal springs meet the sea.

Snorkeling gear, paddleboards and sea scooters come with the boat. Fresh vegetarian small plates are made on board and paired with Greek wine, beer, cocktails and other drinks. You get windproof jackets, fresh towels to keep, bottled water, WiFi and a restroom. The captain is your guide for the whole day. A drone captures photos and videos you take home at no extra cost.

You pick your tour length and boat size when you book. Half-day and full-day options run on a 30ft boat, a 36ft boat, or a 42ft yacht. The larger vessels and longer days let you spend more time at each stop and explore further along the coast.

What’s included

• Snorkeling gear, paddleboards and sea scooters.
• fresh vegetarian small plates with Greek wine, beer and cocktails.
• bottled water.
• windproof jackets and fresh towels to keep.
• WiFi on board.
• complimentary drone photos and videos.
• restroom.
• captain as your guide in English or Greek.

Options for this experience

6 options

30ft Boat: Half-Day TourUp to 6 per booking · Guide in English or Greek · Available from 1 May 2027Lasts 4 hours. Half-day route: Gerakas beach, Tsigrado beach, Kleftiko and the Sikia cave "FREEDOM". The boat is a 30ft RIB built in 2020 and driven by twin 200hp engines for a smooth, efficient ride.

30ft Boat: Full-Day TourUp to 6 per booking · Guide in English or Greek · Available from 1 May 2027Lasts 8 hours, offering a full day of fun with even more unique spots and memories to take home. Full-day route: the Old Sulfur Mines, Gerakas beach, Tsigrado beach, the Purple cave, Kleftiko and the Sikia cave "FREEDOM". The boat is a 30ft RIB built in 2020 and driven by twin 200hp engines for a smooth, efficient ride.

36ft Boat: Half-Day TourUp to 9 per booking · Guide in English or Greek · Available from 1 May 2027Lasts 4 hours. Half-day route: Gerakas beach, Tsigrado beach, Kleftiko and the Sikia cave "TRITON". The boat measures 36ft, was launched in 2023 and has twin 350hp engines for enhanced performance and comfort.

See 3 more options

42ft Yacht: Half-Day TourUp to 11 per booking · Guide in English or Greek · Available from 1 May 2027Lasts 4 hours. Half-day route: Gerakas beach, Tsigrado beach, Kleftiko and the Sikia cave "TALOS". The yacht was introduced in 2025 and features triple 350hp engines, a spacious cabin and a windshield for comfort and luxury.

36ft Boat: Full-Day TourUp to 9 per booking · Guide in English or Greek · Available from 1 May 2027Lasts 8 hours, offering a full day of fun with even more unique spots and memories to take home. Full-day route: the Old Sulfur Mines, Gerakas beach, Tsigrado beach, the Purple cave, Kleftiko and the Sikia cave "TRITON". The boat measures 36ft, was launched in 2023 and has twin 350hp engines for enhanced performance and comfort.

42ft Yacht: Full-Day TourUp to 11 per booking · Guide in English or Greek · Available from 1 May 2027Lasts 8 hours, extending the adventure through a full day with more hidden gems to explore and more unforgettable moments to cherish. Full-day route: the Old Sulfur Mines, Gerakas beach, Tsigrado beach, the Purple cave, Kleftiko and the Sikia cave "TALOS". The yacht was introduced in 2025 and features triple 350hp engines, a spacious cabin and a windshield for comfort and luxury.

You pick the guide language when booking.

You'll see the exact price of each option when you check availability.See dates and prices

Before you book

Days and timesNext departure: 1 May 2027

Book up to4h before

GroupPrivate

Live guideEnglish and Greek

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. If that happens, you're offered another date or a refund.

Prices and times updated 10 days ago

Good to know

Low physical effortPets welcomePublic transport nearbyNot recommended during pregnancyNot recommended with heart problemsNot recommended with back problemsInfants must sit on laps

Operated by Salty Rides

Is this one for you?Book the half-day if you want the main stops without a full commitment. Book the full-day to spend unhurried time at each cave and beach. The larger yachts suit groups who want more space and comfort. The smaller boats are nimble enough to reach tight cave entrances and work well for couples or small families.

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Top questions

What languages is the tour guided in?

Live guide in English and Greek.

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.

What is Kleftiko like when you get there to snorkel?

Kleftiko is a cluster of white volcanic rocks emerging from turquoise water, with natural sea caves and hideouts. The water is crystalline and the sea bottom is described as magical to explore. You can snorkel around the rocks and caves or relax on board first and grab food before entering the water.

Can you actually enter Sikia Cave by boat, or do you just see it from the water?

Sikia Cave is a roofless chamber and the boat motors through the small entrance so you can go inside. Once in, you can walk on the picturesque beach or swim in the sunlit water while the crew prepares snacks.

How long do you spend at each stop?

Time at each stop depends on what you want to do. Gerakas Beach usually gets half an hour or more according to your preference. The other stops follow the same flexible rhythm, so you control how long you linger at Tsigrado's caves, Kleftiko, Sikia and the sulfur mines.

What food and drinks are included on the boat?

Fresh vegetarian small plates are made on board and paired with Greek wine, beer, cocktails and other drinks. Bottled water is also included.

Do I need to bring my own snorkeling gear or is it provided?

Snorkeling equipment is provided on the boat, along with paddleboards and sea scooters if you want to use them.

What's the difference between the half-day and full-day tours?

Half-day and full-day options visit the same stops but the full day gives you more time at each location and the chance to explore further along the coast. Both run on your choice of three vessel sizes: 30ft boat, 36ft boat, or 42ft yacht.