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Boat Tours in Santorini

Volcano Tours

Santorini Volcano Boat Tour including Hot Springs & Therasia

6 hours
Instant confirmation
English, Italian, French and Greek speaking tour guide
Max 130 people
Vessel information The cruise takes place on Traditional Wooden boat
Electronic voucher (e-Ticket) Show the voucher on your mobile device to enjoy the activity
Free cancellation Up to 100% refund according to the cancellation policy
Book Now & Pay Later Secure your spot while keeping your plans flexible. Pay a few days before your experience.
Departure point Old Port or Athinios port
Departure timeDeparture at 10:30, Arrival at 16:30
Meeting info If you select the option with the transfer, there are pre-defined pick-up/drop-off locations, at convenient central spots in most villages. After the booking, you will be advised of a pick-up location that is closest to your hotel or most convenient for you!

Sail across Santorini’s beautiful Caldera and visit the islands of Nea Kammeni and Therasia on this 6-hour cruise. Board a sightseeing boat at the old port and admire Santorini’s cliffs as you cruise to Nea Kammeni. Enjoy free time to walk around its volcanic crater, swim in the warm springs, and visit Therasia island. Explore and have lunch there in your leisure time before cruising back to Santorini. 


The excursion starts from the picturesque old port of Santorini. This port is only accessible by cable car, which is the most common way as it takes only 3 minutes to go down, or you have to descend 587 steps on foot. Important note: You have to pay 6€ more per way for the cable car ticket. Gialos, the Old Port, lies below Fira, nestled at the foot of a rocky cliff. You will be surprised by the steep slopes of the Caldera and, finally, the tiny port will appear under these huge rocks and the cave houses that seem to dangle on the cliff. There, the guides of your excursion will be waiting for you, to give you all the important information and to orientate you on the boat. For more information or clarifications, please don’t hesitate to visit our travel agency which is located down at the port.


Our first destination will be the famous volcano of Santorini! After sailing for 20 minutes, we will reach Nea Kammeni’s jetty. Should you be interested to be guided to the volcano, you will have to pay 5 euros per person as an entrance fee. Then, you will walk to the volcano’s ridge with your guide who is going to explain everything about the history and the geology of the volcano. You will stay at the volcanic island for 1.5 hours and after that, you will embark again for the next stop.

Hot Springs

Our next stop will be the island of Palaia Kammeni, where the famous hot springs are located on the west side, a place that is really popular for its thermal waters. We will stop there for 30 minutes, at a distance of 30 meters from the shallow waters of Agios Nicholaos Beach. Take a dive off the boat and feel the warmth of these extraordinary waters. The waters are also full of sulfur, iron, and other metals coming from the volcano which are very good for the skin, rheumatism, arthritis, and other physical pains.
Important Note: In order to reach Agios Nicholaos Beach, it is essential to have very good swimming skills.

Therasia or Thirassia

The next stop is the island of Therasia. Therasia is a miniature of what Santorini used to be several years ago. Today it is a virgin island, still untouched by tourism and modern lifestyle. The island of Therasia is only 9 sq. km in size and has approximately 300 permanent inhabitants. We will stay there for 2 hours, so as to explore this picturesque and traditional village as well as to taste the authentic Santorinian cuisine. Should you wish, you can also walk around the main village of Manolas, which is the capital of Therasia. The view of Santorini is spectacular from there.


After departing from your last destination, the tour will finish at the old port of Fira. After your disembarkation, in case you have a transfer service, you will be guided to our bus in order to drive you back to your destination. Otherwise, you are free to take your own transport.

What you will see/visit
Booking options
Select Date
Select Participants
Tour Details
  • English, Italian, French and Greek speaking tour guide
  • All taxes
  • Option available that includes pick-up/drop-off at central points in most villages
  • Swimming noodles
What to bring
  • Swimsuit (The sulfur water may stain your swimsuit, so a dark-coloured one would be suggested)
  • Towel
  • Sun hat
  • Comfortable shoes
  • Gratuities (optional)
  • Cable Car fee: 6€ /per person
  • Volcano entrance fee: 5€ /per person . You can book it separately here
  • Towels
  • The traditional meal in Therasia island is not included in the price of the tour (optional)
Additional info
  • Children of the age group 5 to 12 years old will be charged half ticket
  • Subject to favorable weather conditions. If canceled due to poor weather, you will be given the option of an alternative date or full refund
  • A moderate amount of walking is involved
Reviews by real customers
Excellent based on 682 reviews
Andrew S. 30 Sep 2023
Lovely day out

Great value day out on the boat!

Peta H. Australia, 29 Sep 2023
Great Day Out

A great experience! The only thing that would improve would be a little more time at each location. As soon as we got to the top of the volcano we had to turn around and go back so that we would be on time for the boat. We didn’t get to enjoy the views.

Adam C. United Kingdom, 28 Sep 2023
Very well put together!

You receive the name of the tour operator and the location to meet upon buying the voucher. Everything was easy and well-organised. Our guide was very positive despite having to say everything in English, French and Italian. Excellent way to get about the islands without having to spend a fortune. Highly recommend! Also, they make some of the drinks cheaper on the final trip home, just a tip ;)

Colleen E. United States, 27 Sep 2023
Better than expected!!

If you are cruising to Santorini, I highly recommend doing this tour immediately upon arrival! We avoided all of the wait at the cable car by doing this tour first. By the time the tour was complete, there was no line for the cable car, which was the biggest complaint we heard upon getting back on the ship. The tour itself was excellent. Anna and her team were efficient and she is a small but mighty leader! She shared so much information about the islands, volcano, and surrounding areas, in English, French, and Greek. The volcano tour is a MUST DO if you are taking this the extra 5 euro to get in, if you are okay mobility wise. Anna gave multiple warnings that the hike up the volcano is tough, and she wasn't wrong. Especially with how windy it was. Wear good shoes and take your time. The hot springs was a bit rushed, because we were late pulling out of the volcano harbor. And the water was a bit rough, so experienced swimmers only. The stop at Therasia was a dream. There is a small waterfront village with multiple restaurants where we had the best Gyro of our lives (at Tony's Cafe). You can hike up the side of the island, but we elected to stay at the base and enjoy a leisurely lunch and stroll. Others swam in the crystal clear waters, but most just enjoyed a nice lunch. The lunch is NOT included, but the prices were very reasonable. The only recommendation I would make for Caldera Boats is to spend a little more time at the hot springs. But seeing how many little boats were making the same route, I'm guessing there are agreed upon times for each boat to be at each stop so it doesn't get too congested. All in all, it was an EXCELLENT choice of activity to do in Santorini, and we still got to go up into the city for a few hours.

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Good to Know


Once your booking is complete, you will receive the voucher, which includes the meeting point, time and supplier’s contact information, at your email address. You need to have it with you, in paper form or in digital form.


If you cancel at least 1 day in advance of the scheduled date, there is no cancellation fee. If you cancel within 1 day of the scheduled date, there is a 100 percent cancellation fee.

Passport or Id

Full names of the passengers (as shown on their passport or id). Passengers need to have onboard with them their passport or id or a copy of them, in case the Port Authority runs a check on the boat. A picture on their mobile will suffice.

Frequently Asked Questions

Yes, you will hike up to the crater. The hike is about 90 minutes.

It is not difficult. You will walk a path for 45 minutes to reach the crater and then another 45 minutes to return to the boat.

Yes, it is. But do not forget to bring a hat, sunscreen and comfortable shoes with you.

Yes, you can. There is no extra charge, but you will have to carry it in your arms as the path is not suitable for strollers.

Yes, you can take part but you will not able to swim in the hot springs. Instead, on this part of the tour, you will stay on the boat (relax & sunbathe).

Lifejackets are only for an emergency. The crew will provide you with swimming noodles to help you swim. Lifejackets for swimming are only available in some catamaran cruises. Contact us for more info.

Yes, you can. But it will be on your own responsibility as there is no space to store it on the boat.

All boats are fitted with toilets, for the use of guests onboard.
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