Santorini Caldera Tours

Hike to the crater of an active volcano, swim in thermal hot springs, and watch the legendary Oia sunset from the Aegean Sea.

Book a Boat Tour
1600 BC
Minoan Eruption
400m
Max Cliff Height
83 km²
Caldera Area

The Santorini Caldera is a massive, sea-filled volcanic crater, one of the most spectacular natural sights in the world. Formed by the colossal Minoan eruption around 1600 BC, its steep cliffs are now home to the iconic white villages of Fira and Oia. The best way to experience its scale and beauty is from the water. Our boat tours take you to the heart of the caldera to hike the volcano and swim in hot springs. For planning, see our visitors guide and tips on the best time to visit.

Boat tour prices breakdown

    • Classic Volcano & Hot Springs Tour: From €25 per person — A 3-hour trip on a traditional boat to hike the Nea Kameni volcano and swim in the Palea Kameni hot springs.
    • Full-Day Caldera Tour: From €50 per person — A longer excursion that adds a visit to the island of Thirasia and finishes with views of the Oia sunset from the water.
    • Semi-Private Catamaran Cruise (Day or Sunset): From €120 per person — A 5-hour luxury cruise with a smaller group, including a Greek BBQ meal, open bar with local wine, and stops for swimming at Red and White beaches.
    • Volcano Entrance Fee: €5 per person — This is a municipal fee paid in cash upon arrival at the Nea Kameni volcano island and is not included in most tour prices.

Why book your tour here

The easiest way to experience the heart of Santorini

Top-Rated Operators

We partner with the most reputable boat tour companies in Santorini, ensuring safety, quality, and an unforgettable experience on the water.

Free Cancellation

Change of plans? No problem. Cancel up to 48 hours before your tour for a full refund, offering you complete flexibility.

Instant Mobile Tickets

Book in minutes and receive your e-ticket instantly. Simply show the voucher on your mobile device at the meeting point—no printing needed.

Variety of Choices

From budget-friendly traditional boat tours to luxurious all-inclusive catamaran cruises, find the perfect trip to fit your style and budget.

The Eruption That Forged an Island

Around 1600 BC, the island then known as Strongyli ("the round one") was shattered by one of the largest volcanic eruptions in human history. The Minoan eruption, rated 7 on the Volcanic Explosivity Index, was so powerful it caused the center of the island to collapse into the sea, forming the vast caldera we see today. The event is believed to have triggered enormous tsunamis that devastated the Minoan civilization on nearby Crete and may have inspired the legend of Atlantis.

Today, the two small islands at the center of the caldera, Palea Kameni ("Old Burnt Island") and Nea Kameni ("New Burnt Island"), are the result of subsequent, smaller eruptions. When you join a boat tour, you sail across this ancient, flooded crater and can even hike on Nea Kameni, the youngest volcanic land in the Eastern Mediterranean, which last erupted as recently as 1950.

The volcanic island of Nea Kameni in the center of the Santorini Caldera

How It Works

Book your Caldera adventure in 3 simple steps

1

Choose Your Tour

Select from a range of boat tours: a classic volcano trip, a full-day exploration, or a luxury catamaran cruise with BBQ and drinks included.

2

Book Securely Online

Pick your date and number of guests, and complete your booking in seconds. You'll receive an instant confirmation and your mobile ticket via email.

3

Meet at the Port

On the day of your tour, head to the designated meeting point—usually the Old Port of Fira or Ammoudi Bay. Show your e-ticket, board the boat, and enjoy the journey.

Frequently Asked Questions

Everything you need to know about Caldera boat tours

What is the Santorini Caldera?
It's a large, sea-filled volcanic crater formed by a massive eruption thousands of years ago. It is one of the largest calderas in the world and is famous for its towering cliffs and stunning views.
Is the volcano still active?
Yes, the volcano is considered dormant but active. The most recent eruption was in 1950. It is continuously monitored by volcanologists and is safe to visit.
What should I wear for a volcano tour?
Sturdy, closed-toe shoes like sneakers are essential for hiking on the rocky volcanic terrain. Also bring a hat, sunscreen, and swimwear for the hot springs. See our rules and regulations page for more tips.
Are the hot springs actually hot?
The water is lukewarm, heated by geothermal energy. The mineral-rich water, particularly sulfur, can stain light-colored swimwear, so it's recommended to wear a dark-colored suit.
Is a boat tour worth it?
For most first-time visitors, absolutely. Seeing the scale of the caldera cliffs from the water and hiking on the volcano provides a unique perspective on Santorini's geology and history that you can't get from the villages alone.
Which is better: a catamaran or a traditional boat?
Catamarans offer a more luxurious, small-group experience, often with meals and drinks included. Traditional boats are more budget-friendly and carry more passengers. Our boat tours page compares the options.
How do I get to the Old Port of Fira for the tour?
You can take the cable car (3 minutes), walk down the 587 steps (approx. 30 minutes), or ride a donkey. The cable car is the fastest and most comfortable option, especially on the way up.
When is the best time to take a tour?
The shoulder seasons (April-June and September-October) offer pleasant weather with fewer crowds. Sunset tours are iconic but busiest in July and August. For more details, see our best time to visit guide.
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