Santorini: Boat tour to Volcano, Hot Springs & Thirasia island

Santorini’s best boat trips do more than show you the famous caldera. This one takes you onto Nea Kameni’s black volcanic ground, into warm water near Palea Kameni, and across to quieter Thirassia, where white Cycladic houses and waterfront tavernas feel far removed from Fira and Oia.

I like the small maximum group of 24, which keeps the boat more personal and can help you reach each stop before the biggest vessels. I also like the balance of outdoor activity and simple island life: hike the volcano, swim with a noodle, then order lunch in Thirassia.

The main catch is time. A late departure or slow boarding can shorten the hot-spring swim and Thirassia stop, and the volcano walk has no guide. Bring cash for the €5 volcano entry and be ready for heat, wind, and uneven rock.

Key points to know before you book

• A compact five-hour route: Visit the Old Port, Nea Kameni, Palea Kameni, and Thirassia in one morning or early afternoon.
• The volcano hike is independent: You walk toward the crater on your own, with no guide accompanying you.
• The hot springs require swimming: The water is warm and mineral-heavy, but the swim from the boat is deep enough that you need to be comfortable in open water.
• Thirassia adds a welcome change of pace: Use free time in Manolas to eat, stroll, and see a less developed side of the Santorini area.
• Captain service is a strong point: Panagiotis and Manos are named by the operator, and the boat crew receives especially warm praise for kindness and skill.
• Pack for water and sun: Use the supplied towel and pool noodles, wear darker swimwear, and bring a jacket or sweatshirt for wind and spray.

What this Santorini boat tour really includes

This is a half-day outing built around Santorini’s volcanic past. You leave from the Old Port below Fira, cross the caldera by boat, walk over the volcanic island of Nea Kameni, swim at Palea Kameni, and finish with time on Thirassia.

The advertised price is $83. That is a fair value if you want all three experiences in one outing and prefer a smaller boat to a large excursion vessel. Your price includes the boat, restroom, towel, bottled water, pool noodles, one glass of local white wine, and time to explore Thirassia.

You still need to budget for the €5 Nea Kameni entrance fee, paid separately. The cable car from Fira to the Old Port is also extra at €10 each way. Food on Thirassia is not included, so the final cost depends on what you order there and how you reach the port.

The boat holds no more than 24 people. That does not mean you will have a private charter, but it is a useful middle ground between a personal excursion and a crowded day boat. A smaller craft can also move efficiently between stops, though open water may feel choppy at times.

Getting down to Santorini’s Old Port

The tour starts at 10:15 am from Santorini Sea Trips, Anemos Old Port, below Fira. The harbor is reached by cable car, a long stairway, or traditional donkeys. For most people, the cable car is the simplest option, but you must pay separately and allow enough time for possible lines.

The Old Port itself is a pleasant place to begin. It has waterfront cafes, shops, and tavernas tucked below the steep cliffs. The boat ride starts with striking views back toward Fira, where the white buildings sit high above the water.

Confirm the meeting details before leaving your hotel. The operator uses WhatsApp for pre-trip communication, and clear directions can be especially useful when you are trying to find the correct cable car area and harbor meeting point.

The return is to the same port. That means you will need another cable car ride or the climb up the steps after the boat trip. If you have dinner plans or a timed transfer afterward, leave extra room for the climb and port traffic.

Walking across Nea Kameni’s volcanic ground

After roughly 20 minutes of sailing through the caldera, you reach Nea Kameni. This is the tour’s most physical stop and the place where Santorini’s volcanic character feels most direct.

You pay the €5 entrance fee, then walk independently across dark, uneven volcanic rock. The route leads toward the crater area, where the ground and air show signs of past volcanic activity. The dark cliffs and rough rock make a sharp contrast with Santorini’s bright villages.

The scheduled stop lasts about 1 hour and 15 minutes. That sounds generous, but part of it is used getting off and back onto the boat, so wear sturdy shoes and keep an eye on the meeting time. The tour does not provide a guided hike, so you are responsible for your pace, footing, water, and safety.

I would not treat this as a casual stroll in sandals. The walk can be demanding in August heat, especially with little shade. A hat, sunscreen, closed shoes, and the supplied bottle of water will make a real difference.

The lack of a guide is both a limitation and a benefit. You will not receive a detailed explanation of the volcano as you walk, which some people find disappointing. But you can set your own pace and spend more time looking at the crater area rather than following a lecture or a large group.

Swimming near Palea Kameni’s sulfur springs

The boat then moves to Palea Kameni, known for its geothermal waters. You do not step onto a developed bathing area. Instead, you enter the sea from the boat and swim toward the warmer water near the springs.

The water contains sulfur, iron, and other volcanic minerals. It is not necessarily hot in the way a heated pool is, but the warmth can be noticeable, and the experience connects directly to Santorini’s volcanic activity.

This stop is scheduled for about 30 minutes. That is enough for a swim, but not a long soak, especially if everyone is boarding one at a time. One important point: the water is deep, and you must keep swimming. You should be a competent swimmer before booking this part of the trip.

Foam pool noodles are provided, which helps you float and rest. They are useful, but they do not replace swimming ability. If a child or adult is not confident in open water, the hot-spring stop may be more stressful than relaxing.

Wear an old or dark-colored swimsuit. Sulfur can stain light swimwear. The boat supplies a towel, and you return it to the staff, so there is no need to bring a valuable beach towel from your hotel.

Finding a quieter Santorini on Thirassia

Thirassia is the most rewarding stop for anyone who wants a break from Santorini’s packed lanes and cliffside viewpoints. The island was once connected to Santorini before the major eruption in the 16th century BC. Today, it retains a more traditional character.

You have about 1 hour and 15 minutes here when the schedule runs on time. The village of Manolas, Thirassia’s main settlement, has Cycladic houses and winding lanes. The waterfront has tavernas where you can order local food and wine.

The key word is quiet. Thirassia is not a second Oia, and that is precisely the point. You will not find the same dense shopping streets or polished viewpoint scene. Instead, you get a short look at a slower island setting and a chance to eat beside the water.

I would make lunch the priority if you enjoy Greek food. A meal here can become one of the best parts of the day, but keep track of the departure time. The stop is not long enough for a leisurely, multi-course meal if the boat arrives late or the group takes time to board.

One schedule warning deserves attention. Delays at earlier stops can reduce Thirassia to a quick walk or even just enough time to order food. Since lunch is not included, ask the taverna about timing as soon as you arrive, and do not wander too far from the waterfront.

A small boat, a kind captain, and limited commentary

The boat and crew are central to the quality of this outing. Panagiotis is praised for being calm, experienced, and helpful, while Manos is also singled out for making the trip enjoyable. The crew’s friendly attitude matters when you are boarding from the water, managing towels, or helping a nervous swimmer.

The boat is smaller than many vessels serving the caldera. That usually gives you a more personal feel, but it also means space can be limited. One passenger described it as comfortable but small, so do not expect wide open decks or a lot of room to spread out.

The boat has a restroom, which is useful during a five-hour route. You also receive bottled water and a glass of local white wine. The wine is served in a small plastic coffee-style cup rather than a proper wineglass, so think of it as a modest refreshment, not a tasting session.

Commentary is the weak spot. The captain may be warm and capable without offering much information about the volcano, springs, or Thirassia. If you want a strong history lesson, bring a guidebook or read about the sites beforehand.

That tradeoff may suit you if you mainly want transportation, swimming, scenery, and free time. It may not suit you if a guide’s explanations are the main reason you book a boat tour.

Timing, weather, and what to pack

The route lasts about five hours, but each stop depends on the group staying on schedule. Boarding can take time, particularly at the springs, where people enter and leave the boat individually. The operator needs everyone back on time to keep the itinerary moving.

Wind is another factor. The boat can feel choppy on open water, and spray may reach the deck. Bring a light jacket or sweatshirt even on a hot day. A dry layer for the return ride will make the final sail more comfortable.

Pack:

• Cash for the €5 Nea Kameni fee and the cable car
• Closed shoes for the volcanic walk
• Dark swimwear that will not show sulfur stains
• Sunscreen, a hat, and a light jacket
• Water, although one bottle is supplied
• A phone with the meeting details saved

The experience requires good weather. If conditions force cancellation, you are offered another date or a full refund. You can also cancel for a full refund up to 24 hours before the 10:15 am start time. Inside that window, the payment is not refunded, and changes are not accepted.

Most people can take part, and service animals are allowed. Still, the volcano has uneven ground, and the hot springs require open-water swimming. Those practical limits matter more than the general participation note.

Who will get the most from the $83 price

I think this tour suits you best if you want to combine several Santorini highlights without spending a full day at sea. The route gives you three distinct experiences: volcanic geology, a mineral-water swim, and a traditional island stop.

It is also a good fit for couples and small groups who value a calmer boat atmosphere. Families can enjoy the scenery and Thirassia, but parents should think carefully about the deep water at the springs and the heat on Nea Kameni.

You may want another type of excursion if you need a fully guided volcano walk, a long hot-spring session, a large amount of free time on Thirassia, or a formal wine experience. This is a hands-on sightseeing trip, not a polished lecture tour.

The strongest value comes from the combination. Paying separately for transport, a harbor visit, a volcano stop, and Thirassia could take more planning, while this route handles the boat connections in one morning. The extra fees and meal cost keep it from being an all-inclusive bargain, but $83 is reasonable for the length, equipment, and small-group format.

Should you book this Santorini boat trip?

Book it if you want to walk on volcanic ground, swim in warm sulfur water, and have a short taste of quieter island life. The kind captains, smaller group, supplied towel and noodles, and efficient route make the outing easy to recommend for active visitors.

Skip it if you dislike boats, cannot swim confidently in deep water, struggle with uneven paths, or expect detailed guiding at every stop. For the best day, arrive early at the Old Port, carry cash, wear proper shoes, protect yourself from the sun, and treat Thirassia lunch as a timed stop rather than a long restaurant break.

FAQ

Where does the Santorini boat tour start?

It starts at Santorini Sea Trips, Anemos Old Port, Santorini, Thira 847 00, Greece. The start time is 10:15 am, and the tour ends back at the same meeting point.

How do I reach Santorini’s Old Port?

You can reach the Old Port by cable car, stairs, or traditional donkeys. The cable car costs €10 each way and is not included in the tour price.

How long does the experience last?

The boat trip takes approximately five hours. The planned stops include about 1 hour and 15 minutes at Nea Kameni, 30 minutes at the hot springs, and 1 hour and 15 minutes on Thirassia, along with sailing time.

Is the volcano hike guided?

No. You walk on Nea Kameni independently, without a guide. The €5 entrance fee is also separate from the tour price.

Do I need to be a strong swimmer?

You need to be comfortable swimming in open water because the hot springs are reached from the boat and the water is deep. Pool noodles are provided, but they do not replace swimming ability.

What is included on the boat?

The tour includes a restroom, foam pool noodles, one bottle of water, a returnable towel, one glass of local white wine, and free time on Thirassia. Food is not included.

Can I cancel for a refund?

You can cancel at least 24 hours before the start time for a full refund. Cancellations or changes made less than 24 hours before departure are not refunded or accepted. Poor weather or failure to meet the minimum number of participants may result in another date or a full refund.