Santorini’s best day trips get you away from the whitewashed lanes and onto the caldera itself. This five-hour boat tour visits the black volcanic slopes of Nea Kameni, the warm waters near Palea Kameni, and the quieter island of Thirassia, giving you three very different views of the Santorini area in one morning.

I like the small maximum group of 24 and the fact that the boat often reaches the stops before the largest vessels. I also like the stop in Thirassia, where you can eat by the waterfront and see a slower, more traditional side of island life. The main consideration is that the volcano walk is unguided, and the hot-spring swim can be tiring for anyone who is not a confident swimmer.

Key points to know before you book

• The volcano hike is on your own: You pay the €5 entrance fee separately and walk across rough, exposed ground without a guide.
• The hot springs are reached from the boat: The water is warm rather than bath-hot, and you need to swim from the boat to the sulfur-rich area.
• Thirassia gives the tour its local feel: You have free time in Manolas and the waterfront tavernas, but delays can shorten this stop.
• The group is limited to 24 people: That is smaller than many Santorini boat excursions and can help the captain move efficiently.
• A towel, water, pool noodles, and one glass of local white wine are included: Food, the cable car, and the volcano fee are extra.
• Allow extra time and money for the Old Harbor: You reach the port by cable car, stairs, or traditional donkey ride, with the cable car costing €10 each way.

Starting below Fira at the Old Harbor

The tour starts at Santorini’s Old Harbor, also called Fira Port, at 10:15 a.m. The port sits far below Fira’s cliff-top center, so reaching the boat is part of the outing. You can take the cable car, walk the steps, or ride a traditional donkey. The cable car costs €10 each way, and that cost is not included in the tour price.

I would plan this part carefully. The meeting point is at Santorini Sea Trips, Anemos, in the Old Port. Give yourself enough time to get down from Fira, especially if you are staying near the cable car station or arriving from another part of the island. The operator uses WhatsApp for pre-tour communication, which can be useful if you are unsure where to go or need help with timing.

The harbor has waterfront tavernas, small shops, and cafes. It is a pleasant place to wait, but remember that your return is to this same low-level port. You will still need to get back up to Fira after the boat ride, and the cable car queue can matter at busy times.

The boat carries up to 24 people. That is not a private charter, but it is a more personal scale than the large excursion boats that gather around the caldera. Captains named Panagiotis and Manos have been especially praised for being kind, calm, and helpful. The crew may also assist with practical matters, such as helping children near the water or making sure everyone boards safely.

Sailing across the caldera to Nea Kameni

The first cruise takes about 20 minutes across the caldera to Nea Kameni. This is the volcanic island that gives the first part of the trip its stark look: dark lava rock, bare slopes, and rough ground underfoot. It is a sharp change from Santorini’s bright villages and polished viewpoints.

You have about 1 hour and 15 minutes at Nea Kameni. The aim is to walk toward the crater rim and see the volcanic terrain from close by. You are not simply looking at the volcano from a boat. You get out and walk across the island, so sturdy shoes, water, and sun protection matter.

The hike is not presented as guided. You are responsible for your own route and safety, and the crew does not provide a volcano lecture as part of the standard experience. This is important if you expect a history lesson or a naturalist guide. You can still appreciate the setting, but you should be comfortable following the marked walking area and managing your own pace.

The ground is rocky and exposed. In August heat, the walk can feel hard, especially with little shade. One practical advantage of the schedule is that the boat may arrive before some larger boats, giving you a quieter period on the island. That timing is not guaranteed, but a smaller boat can make it easier to move promptly between stops.

The €5 Nea Kameni entrance fee is extra. Bring cash, since the fee and other port costs are not covered in the $83 tour price. The boat does provide a bottle of water, but I would still treat this as an active walk rather than a casual stroll.

Swimming near Palea Kameni’s sulfur springs

After Nea Kameni, the boat continues to Palea Kameni for about 30 minutes. This area is known for warm geothermal water containing sulfur, iron, and other volcanic minerals. The water is generally warmer than the surrounding sea, though it is not necessarily the hot bath you may picture from the name.

You enter the water from the boat. The hot-spring area is not described as a developed beach or spa, so this is a swim stop with a natural setting rather than a shore-based soak. Pool noodles are provided, which is helpful because the water is deep and you need to keep swimming instead of standing on the bottom.

That detail changes who will enjoy this stop. Confident swimmers can paddle around and feel the temperature change as they reach the warmer water. If you are not a strong swimmer, or if you are traveling with a child who cannot swim well, you may prefer to remain on the boat. The captain can help with the practical side, but the water itself still demands care.

Bring an old or dark swimsuit. The sulfur can stain light-colored swimwear. You also receive a returnable towel, so you do not need to bring a beach towel from your hotel. After the swim, the towel and the sea breeze are welcome, but a light jacket or sweatshirt is worth packing because the open-water ride can be windy and spray can reach the boat.

The 30-minute stop may feel short. Boarding everyone one at a time, swimming out, and returning to the boat takes a portion of the time. If the boat is delayed earlier in the day, the actual swim can be shorter still. One account described having less than ten minutes in the water after boarding time was taken into account. I would enjoy this as a memorable swim, not as a long spa session.

Thirassia, the quieter side of the caldera

The final major stop is Thirassia, an island that was once connected to Santorini before the huge volcanic eruption in the 16th century BC. It feels far less developed than Fira or Oia, and that contrast is the point. You get winding lanes, Cycladic houses, a small-island pace, and waterfront places to eat and drink.

The scheduled stop lasts about 1 hour and 15 minutes. You can wander around the main village of Manolas, described as the island’s capital, or settle into a traditional taverna. Local food and wine are available to purchase, while the tour includes one glass of local white wine on board.

Thirassia is especially useful for people who want more than volcanic scenery. The volcano and hot springs show you Santorini’s geology. Thirassia gives you a chance to sit down, look around, and experience an island community that has not developed at the same speed as its famous neighbor.

Lunch here can be a highlight, but you need to watch the clock. The boat cannot wait for late passengers, and delays earlier in the trip may reduce your time on the island. A scheduled 75-minute stop sounds generous, yet it can become much shorter if boarding at the hot springs takes too long or if the group runs behind.

If you want a full restaurant meal, ask about timing before ordering. A quick lunch or drink near the waterfront is safer than choosing a slow meal far from the meeting point. You can also use the stop simply to walk through Manolas and enjoy the quieter setting.

The boat, crew, and included extras

The boat is described as smaller than many of the other boats in the area. That is good for a close-up route and can help the captain get into position before larger groups arrive. The tradeoff is space. One assessment found the boat comfortable but small, so do not expect the room of a large cruise vessel.

A restroom is available on board. You also receive a bottle of water, a towel that must be returned to staff, and foam pool noodles for the swimming stop. One glass of local white wine is included, generally served in a small plastic cup. The wine itself can be enjoyable, but this is a simple onboard refreshment, not a tasting session.

The strongest part of the service is the captain. Panagiotis is repeatedly singled out for being experienced, pleasant, and attentive. Manos is also praised for creating a good day on the water. The crew appears willing to help families and clarify directions, and the company communicates before departure through WhatsApp.

The weaker point is interpretation. You may not receive detailed information about the volcano, hot springs, or Thirassia while on the route. If you want geology and history explained as you go, bring a guidebook or read about the sites before boarding. This trip is better understood as a boat outing with independent exploring than as a fully narrated educational tour.

Is $83 a fair price?

At $83, the tour offers a solid bundle: about five hours on the water, three stops, a small-group format, a towel, water, pool noodles, a restroom, and one glass of wine. You are paying for the boat route and the convenience of combining sites that would otherwise be difficult to reach in one morning.

The price is less complete than it first appears. Add €5 for Nea Kameni, €10 each way for the cable car if you use it, and money for food and drinks in Thirassia. The cable car cost alone can add a noticeable amount for two people, especially if you are budgeting closely.

I think the price works best if you value the smaller boat and the combination of volcano, hot springs, and Thirassia. It is less compelling if you mainly want a long swim, a full meal, or detailed guiding. In that case, the short water stop and independent volcano walk may leave you wanting more.

The 95 percent recommendation rate and 4.7 rating from 22 submitted ratings point to a dependable experience, while the individual scores also show the main limits clearly: short stops when timing slips, limited commentary, and a boat that is comfortable but not spacious.

Who should book this Santorini boat tour?

I would choose this trip if you want a compact introduction to Santorini’s caldera and prefer a smaller group to a large boat. It suits active couples, families with confident swimmers, and people who want a quiet hour on Thirassia as well as the standard volcanic sights.

It is also a good fit if you like making your own choices. You walk the volcano without a guide, choose how much to explore, and decide whether to swim, rest, or use the noodles at Palea Kameni. The crew handles the boat, but you control much of the time on land.

I would think twice if you have difficulty walking over uneven ground, dislike strong sun and wind, or are not comfortable swimming in deep water. The experience may also disappoint you if you expect a narrated tour with detailed facts at every stop.

Pack closed shoes, a swimsuit you do not mind staining, sun protection, a light jacket, and cash for the volcano fee and cable car. Keep your phone protected from spray, and return promptly when the captain calls everyone back.

Should you book it?

Book this tour if you want three distinct experiences in roughly five hours: a volcanic walk, a warm-water swim, and a relaxed stop on Thirassia. The smaller group, helpful captains such as Panagiotis and Manos, and early access to the sites give it a practical edge.

Skip it if the climb, deep-water swimming, or extra port costs are a problem. For most able-bodied visitors who plan ahead, $83 is reasonable, but the best value comes from treating this as an active, self-guided boat adventure rather than a full lecture tour or luxury cruise.

Free cancellation is available up to 24 hours before the 10:15 a.m. start for a full refund. Poor weather or failure to reach the minimum number of participants can also lead to a new date or a full refund.

FAQ

Where does the Santorini boat tour start?

It starts at Santorini Sea Trips, Anemos, in Santorini’s Old Harbor, also known as Fira Port.

What time does the tour begin?

The scheduled start time is 10:15 a.m.

How long does the experience last?

The boat tour lasts approximately five hours and ends back at the Santorini Old Harbor meeting point.

How do I reach Santorini’s Old Harbor?

You can reach the harbor by cable car, stairs, or traditional donkey ride. The cable car costs €10 each way and is not included.

Is the volcano hike guided?

No. The walk around Nea Kameni is on your own, and you are responsible for your safety.

Is there an extra fee for Nea Kameni?

Yes. The entrance fee is €5 per person and is not included in the tour price.

Can I swim at the hot springs?

Yes. The boat stops near the hot springs at Palea Kameni, where you can enter the water and swim toward the warmer area.

What should I know about swimming at the hot springs?

The water is deep, so you need to swim continuously. Pool noodles are provided, but you should be a confident swimmer. Sulfur may stain light-colored swimwear.

What is included in the tour price?

The tour includes a restroom on board, foam pool noodles, free time in Thirassia, one glass of local white wine, a returnable towel, and one bottle of water. Food, the cable car, and the Nea Kameni entrance fee are extra.