Snorkeling in Milos: Catamaran to Kleftiko & Poliegos

Kleftiko Beach and the pirate coves of Milos, reached only by boat

A full-day catamaran tour from Milos visits four swimming and snorkeling stops, including Kleftiko Beach—a white-rock formation used by pirates centuries ago—and Poliegos, an uninhabited island with a narrow bay of transparent light-blue water. The boat carries snorkeling equipment, lunch with local wine and beer, and a live English guide; the itinerary shifts to Tsigrado or Gerakas if north winds arrive. Ten hours on the water, suitable for all fitness levels.

Step-by-step itinerary

Full-day catamaran tour around Milos

• Visit Cape Vani historical site
• Swim at Kalogries beach
• Pass by Sykia cave
• Explore Kleftiko for snorkeling
• Swim in crystal clear waters
• Pass by Theiorychia mining site
• Swim at Galazia Nera bay, Poliegos
• Pass by Klima Village

The Experience

The catamaran leaves Milos and heads first to Cape Vani, where manganese mines opened in 1898 left ruins visible on the cliffs above the water. From there the route moves to Kalogries beach, known for the clearest sea in the region, then to Sykia—a cave with an open roof so narrow at the entrance that a small inflated boat is needed to slip inside and see it. These are the warm-up stops; the day builds toward Kleftiko.

Kleftiko is the reason most people book this tour. White volcanic rocks rise from crystal-clear water, and the spot has a genuine history—real pirates anchored here centuries ago. The snorkeling is strong because the water stays transparent and deep enough to hold fish and detail. You get time in the water with the provided equipment, and the rocks frame the kind of photographs that justify the full day on a boat. After Kleftiko, the route continues to Poliegos, the largest uninhabited island in the Aegean, where the final swim happens in Galazia Nera bay—a narrow inlet with steep white rocks, white sand and the light-blue water that earned it the nickname Blue Lagoon.

Lunch and drinks arrive midday: the boat carries local house wine, beer, soft drinks and snacks, plus a full meal. An action camera is included if you want footage of the underwater moments. The guide speaks English throughout and can point out the history and geology as the boat moves between stops. If north winds arrive, the itinerary shifts to Tsigrado, Kleftiko or Gerakas instead, but the meeting point stays the same and the day structure holds.

What’s included

• Snorkeling equipment and action camera.
• full lunch with local house wine, beer and soft drinks.
• breakfast and snacks.
• all fees and taxes.
• live English-speaking guide for the full day.

Good to know

Easy physical levelPets welcomePublic transport nearby

Operated by Trinity Yachting

Is this one for you?Book this if you want a guided group experience where the crew sets the swimming stops and timing—you'll visit remote beaches accessible only by boat, with lunch and snacks included.

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Top questions

What is Kleftiko Beach like for snorkeling?

Kleftiko Beach is a white-rock formation shaped by ancient volcanoes, used as an anchorage by pirates in past centuries. The crystal-clear water and rocky underwater terrain make it ideal for snorkeling, and the dramatic cliffs above the waterline create striking photographs.

Can I reach these beaches any other way, or is the boat the only option?

These are remote beaches accessible only by water—there are no roads or paths to them from land. The catamaran is the way to reach Kleftiko, Poliegos and the other stops on this itinerary.

What happens if the weather is bad on the day I book?

If north winds arrive, the tour shifts to alternative beaches: Tsigrado, Kleftiko or Gerakas. The meeting point and departure time stay the same; only the specific stops change to keep the day safe and swimmable.

Is snorkeling equipment provided, or do I need to bring my own?

Snorkeling equipment is included with the tour, so you don't need to bring or rent it separately. An action camera is also available if you want to record underwater moments.

How much time do I spend actually swimming and snorkeling versus traveling between stops?

The full day is ten hours on the water, with multiple swimming and snorkeling stops built into the route. The boat moves between Milos, Poliegos and the individual coves, so time splits between travel and water time at each location.

What is Poliegos island, and why is it part of this tour?

Poliegos is the largest uninhabited island in the Aegean Sea. The tour's final swimming stop is at Galazia Nera bay on Poliegos—a narrow inlet with white sand, steep white rocks and transparent light-blue water, nicknamed the Blue Lagoon for its color and isolation.