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Glass-Bottom Boat Trip to Santorini Volcano, Hot Springs, & Therasia
6 hours - 9 hours
Instant confirmation
English and Greek speaking tour guide
Max 130 people
Vessel information
The cruise takes place on a Glass Bottom 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
Lowest Price Guarantee
Book with confidence! Find a lower price, and we'll refund the difference.
Starting location
Old Port or Athinios Port
Starting timeDeparture at 10:45, Arrival at 16:45
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!
Embark on a unique glass-bottom boat adventure to Santorini's volcanic caldera. Explore the active volcano, soak in therapeutic hot springs, and marvel at underwater wonders through the boat's transparent floor.
Join a 6-hour or 9-hour shared tour across Santorini's caldera, where you will explore the island's stunning vistas and vibrant marine life from a unique perspective. The glass-bottom boat offers a clear view of the underwater world, allowing you to see fish and other sea creatures without getting wet. Along the way, you will also visit the island's famous Volcano, take a dip in the Hot Springs, and explore Therasia Island.
The 6-hour half-day cruise gives you flexibility in terms of departure times and locations. If you choose the transfer service, you will depart from Athinios Port at 10:20 am. Alternatively, if you opt to meet us at the Old Port, the tour starts at 10:45 am. The 9-hour full-day cruise includes a transfer service and departs from Athinios Port at 10:20 am, wrapping up the day with a breathtaking sunset in Oia!
Your adventure begins with a hike to the volcanic crater, at Nea Kameni Island! You will have about 1 hour and 15 minutes to make the round trip, which takes about 20 minutes each way on a well-maintained path. The panoramic view from the top is a rewarding experience! The next destination is Palaia Kameni Island, where you will find the famous Hot Springs. The boat anchors near the small bay of Agios Nikolaos, where you can swim a short distance to reach the warm, sulfur-rich waters. These waters are typically 3 to 4 degrees Celsius warmer than the surrounding sea temperature. Enjoy a relaxing soak for about 30 minutes before you move on. The next stop is Therasia Island, where you will have about 2 hours of free time. Explore the charming island, swim at Korfos Beach, or enjoy a meal at a local tavern. Following that, the boat sails beneath the village of Oia, providing you with the opportunity to capture photographs with the iconic white houses of Oia in the background. Then, the boat returns to the Old Port for passengers who opted for this departure point, while those with transfer service continue to Athinios Port.
If you are on the 9-hour full-day cruise, your journey doesn't end there! A bus will be waiting at Athinios Port to take you to the picturesque village of Oia, where you can wander the narrow streets, shop for unique souvenirs, and watch the famous sunset. The bus will then return you to your starting point, concluding a day filled with unforgettable memories!
Comparing the 6-hour and 9-hour options, the shorter cruise includes a hike to the volcanic crater on Santorini, a swim in the hot springs of Palaia Kameni Island, and a couple of hours on Therasia Island before returning to the port. In contrast, the 9-hour full-day cruise, which departs from Athinios Port, extends the adventure by including a visit to the village of Oia. After exploring Therasia, participants on the full-day tour are taken by bus to Oia to enjoy its scenic streets and iconic sunset, making for a more comprehensive and leisurely exploration of Santorini. Both options provide rich experiences, but the full-day tour offers additional time in Oia for a complete day of discovery.
Whether you choose the half-day or the full-day option, the glass-bottom boat tour offers a truly unique way to experience the magic of Santorini!
What you will see/visit
Tour Details
Inclusions
- English 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
Exclusions
- Gratuities (optional)
- Cable Car fee: 10€ /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 6 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
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4.7
Excellent
based on 45 verified reviews
Traveler StoriesWhat travelers experienced
FEATURED REVIEW
SS
11 users found this review helpful
Samuel S.
United Kingdom,
19 Jul 2025
Amazing trip!
We did the "Glass-Bottom Boat Trip to Santorini Volcano, Hot Springs, & Therasia" (with transfer)We were staying in Pyrgos and was told where to meet at 9:30. A mini van turned up to take us to Athinios port then the driver told us where to go once we arrived. Once we got on the boat Anastasia was a great guide. She explained all the stops and we were given more information before we got to each point.The volcano walk was spectacular. Very hard walking in the 30 degree heat though. Took about 25 mins each way but well worth doing. Rocky terrain and lots of ups and downs so sturdy footwear is recommended. The hot springs looked like fun, but as we're not strong swimmers we stayed on the boat and watched. Therassia island was lovely. Had nearly 2 hours here which was enough time to wander, drink coffee and eat ice cream! On the way back to the port we went close and followed the coastline from Oia with some amazing views of all the villages on the top. Once we got back to the port we all got off the boat people with transfers were told to to wait. Names were then called to different coaches to get dropped off.The whole trip seemed very well organised, especially considering the number of people on the boat.(The boat itself was nice, but it would have seemed far too crowded if there had been any more people in board. And would be nice if the toilets had locks on them!)Overall a very enjoyable trip with some amazing scenery and I would definitely recommend it., Well organized!, A great experience!, Wonderful experience!
SC
Soon Keong C.
United Kingdom,
16 Nov 2025
Highly recommended. A highlight of our trip!! Good guide & Clean Boat
Probably the best excursion we had for our Santorini trip, something different but healthy to do in Santorini, Guide was nice and informative, the boat is cleaned and comfy, they cared about the safety of the tourists (the most important thing). Becos we came to Santorini at the end of the season (end Oct) not many people, we almost had the whole boat for ourselves!! Love it!! The swim to the hot springs is a highlight, but make sure you are strong enough to do it. The volcano was truly amazing, I love a bit of exercise and the short hiking to the volcano just perfect, very interesting to see how Santorini became an island like today, picked up some volcanic rocks to home as souvenir too! Brilliant. The visit to the Therasia island was relaxing, had a fantastic meal in one of the restaurant, the fish soup was amazing. We were lucky, weather was nice and ended the tour with a drive by of Oia for the wonderful view, loads of pictures taken, for €37pp you can't fault it, but I would imagine during peak season this boat will be packed, best to pre-book it in advance.
SC
Silvio C.
19 Oct 2025
Amazing
It was a great experience, we just think it was a short time in the hot waters and the place where the boat stopped to see the seabed had nothing special there. but it is an essential tour to be done!
EL
Esther L.
United Kingdom,
8 Oct 2025
Fantastic tour
We missed our glass boat ride, instead we went to the normal sealing ride with Jason the boat. He is a fantastic tour guide and very knowledgeavle showing us around from the volcano, and hotspring and show around Oia on the boat side., Wonderful experience!
AL
Arti L.
United States,
3 Oct 2025
Amazing tour!
Get ready to hike, it's not for everyone but take your time and do it! The guide was amazing! Loved seeing a small island and contributing to the tourism. We ate at captain johns and it was great.
Good to Know
Voucher
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.
Cancellation
For cancellations made at least 24 hours prior to the scheduled day, 100% of the fare is returned and there will be no additional costs. For cancellations made less than 24 hours prior to the scheduled day or no-show, the fare is not refunded. For date changes requested within 24 hours of the scheduled trip, no refund is available. In case of cancellation due to bad weather conditions, the fare is 100% refundable.
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).
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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