The quietest and greenest of the main Sporades islands, Alonnisos is home to Greece’s largest marine park, protecting the endangered Mediterranean monk seal in some of the clearest water in the Aegean.

Why Visit Alonnisos

Alonnisos offers a genuinely unspoiled island experience, centered around marine conservation, hiking trails, and beaches far less developed than its Sporades neighbors.

Top Experiences

  • National Marine Park of Alonnisos: Take a boat tour into Greece’s largest marine protected area, home to endangered monk seals and dolphins.
  • Old Alonnisos (Chora): Explore the island’s original hilltop village, rebuilt by artists and craftspeople after a 1965 earthquake.
  • Alonnisos Hiking Trails: Walk the island’s network of trails connecting beaches, monasteries, and viewpoints.
  • Kokkinokastro Beach: Relax at this striking red-pebbled beach, also home to submerged ancient ruins.
  • Patitiri: Visit the island’s modern port town, the main hub for ferries and marine park boat tours.
SemiPrivate Trip on 50ft Traditional Wooden Boat with Greek Lunch

SemiPrivate Trip on 50ft Traditional Wooden Boat with Greek Lunch

★ 5.0 (130)
From USD 151.04
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Private Boat Cruise around Skiathos island

Private Boat Cruise around Skiathos island

★ 5.0 (34)
From USD 1376.13
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Sacred Skiathos

Sacred Skiathos

★ 5.0 (7)
From USD 48.11
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Skiathos Guided Olive Oil Tasting Experience

Skiathos Guided Olive Oil Tasting Experience

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From USD 61.53
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Private Cruise on a RIb Boat

Private Cruise on a RIb Boat

★ 5.0 (2)
From USD 2013.85
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Sunset Cruise on Luxury Private Yacht with Snacks and Drinks

Sunset Cruise on Luxury Private Yacht with Snacks and Drinks

★ 5.0 (1)
From USD 893.93
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Practical Tips

  • Book a marine park boat tour in advance, as spots are limited to help protect the monk seal population.
  • Old Alonnisos (Chora) offers the island’s best sunset views and a more atmospheric place to stay than the port.
  • Alonnisos remains one of the least developed Sporades islands, so pack essentials as options are more limited than Skiathos.

FAQ

What is Alonnisos known for?
Alonnisos is known for its national marine park and its role in protecting the endangered Mediterranean monk seal.

How do you get to Alonnisos?
Alonnisos is reached by ferry from Skiathos airport or the mainland port of Volos.

Can you see monk seals on Alonnisos?
Sightings are not guaranteed, but marine park boat tours offer the best chance of spotting them in the wild.