Santorini Port: Cruise to Volcano, Hot Springs & Thirassia

Santorini’s caldera is more than a postcard view from the cliff tops. From the water, you see the steep volcanic walls from below, then step ashore on Nea Kameni to walk across the rugged ground toward an active crater.

I like this trip for two things: the contrast between the volcano hike and the swim stop, and the time on quiet Thirassia, where lunch and a climb to Manolas are yours to plan. One consideration: the terrain is uneven, and the swim at the hot springs requires you to enter the water from the boat.

Key points

• Walk on Nea Kameni: Take a self-guided hike over rocky volcanic ground toward the crater. The €5 entry fee is extra and cash only.
• Swim at Palea Kameni: Reach the hot-spring area by swimming from the boat. Foam noodles are provided, but the water may be only warm rather than truly hot.
• Set your own pace on Thirassia: Use your free time for lunch by the dock or a climb up the staircases to Manolas.
• See the caldera from the water: The sailing route offers views of Santorini’s cliffs and, on the return, the coast near Oia.
• Budget for port access: The optional cable car costs €12 each way. Food and drinks are extra, with drinks available to buy onboard.
• Prepare for a walking day: Comfortable shoes, swimwear, a towel, sun protection and cash will make the outing easier.

A six-hour route through Santorini’s caldera

This is a practical way to see several sides of Santorini in one outing: the volcanic islands, the hot-spring bay, Thirassia and the cliffs around the caldera. The six-hour trip moves between boat time and shore stops, so expect a full day rather than a leisurely cruise with just one brief landing.

If you meet in Fira, the meeting point is the Santo Star Office at Fira Old Port. The stated meeting time is 10:15 am, with departure at 10:30 am. The port sits below Fira, so factor in the journey down from town. The cable car is listed at €12 each way and is not included in the tour price. If you select hotel pickup and drop-off, the cruise instead departs from Athinios port at 9:45 am.

Pickup may be from a nearby point rather than right outside your hotel, especially if the hotel is not easy to reach by vehicle. The provider sends the location and time by email. If that message has not arrived by the day before, contact them to confirm where to go. It is also important to provide each participant’s full name and date of birth when booking, as the port authorities require those details.

An English-speaking guide and onboard audio commentary provide context as you travel. Guides have included Roula, Yannis, Georgia and Gianni, though you should not assume a particular guide will be assigned to your departure. Drinks can be bought at the onboard bar; food is not included.

Nea Kameni: volcanic ground and a steady uphill walk

The first major stop is Nea Kameni, an active volcanic island in the middle of the caldera. You can take a self-guided walk toward the crater across a stark, rocky surface shaped by eruptions. It is a striking change from Santorini’s white villages and blue water: here, the ground itself is the attraction.

The walk is optional, but it is a central part of the experience if you want to understand the islands beyond their famous views. The route involves uneven surfaces and a moderate amount of walking. The climb can feel like a slog, particularly in warm weather, but the views from higher up are a strong payoff. You do not need to rush to the top to get something from the stop; if the full climb feels like too much, you can walk partway and turn back.

Wear comfortable shoes with a firm grip. Loose, rough ground is not a place for flimsy sandals, and a hat, sunglasses and sunscreen are useful in the open sun. The tour does not include the volcano’s €5 entrance fee, which must be paid in cash. Keep that money separate and ready rather than hoping a card will work.

The guide’s explanations help make the walk more than a scenic climb. The islands’ shape and rock layers are easier to read when someone points out what you are looking at. Still, this is not a guided trek step by step: the hike is described as self-guided, so pay attention to the meeting time and instructions before setting off.

Palea Kameni: a swim that starts at the boat

After Nea Kameni, the boat heads to Palea Kameni, where the hot springs meet the sea. The swim stop is a welcome change after the walk, but it is worth setting expectations: the water may feel warm rather than bath-hot, and the experience is as much about swimming in a volcanic bay as soaking in a thermal pool.

You enter the water from the boat and swim toward the hot-spring area. Foam pool noodles are provided, which can help if you are not a confident swimmer. Life jackets are supplied only in an emergency, so do not count on one as standard equipment. If you are uneasy in open water, this stop may not be comfortable for you.

Be ready before the boat arrives. Wear your swimsuit under your clothes, because changing space is limited and the bathrooms onboard are small. Bring a towel and consider wearing a dark swimsuit: the mineral-rich water can discolor lighter fabric. Some parts of the bay have rocks below the surface, so take care as you swim.

The stop can feel short, especially if you need time to get changed or are cautious in the water. There is no need to force it. You can choose not to swim, but the tour’s main appeal at this stop is the chance to get into the water, rather than viewing the springs from a long shore visit.

Thirassia: lunch, village lanes and a climb to Manolas

Thirassia is the slowest-paced stop, with free time to explore at your own speed. The island offers a quieter counterpoint to Santorini’s cliff-top towns. You can stay near the dock for lunch, or take the uphill route toward Manolas for broader views across the bay.

The climb involves a long run of steps and can be tiring, particularly after the volcano walk. The payoff is a different vantage point over the water and the boats below, along with the chance to eat at a village restaurant. If you make the climb, keep an eye on the time: you will need to walk back down and return to the boat before departure.

A traditional donkey ride to Manolas is listed as an optional choice at your own expense. Availability may vary, so do not build your plan around it. Walking the staircases is the dependable option, but it is not the best fit for anyone with limited mobility or a dislike of steep climbs.

Lunch is not included, which gives you control over how to spend the stop but means you should budget separately. The dock area has places to eat, while the village above offers another setting if you are willing to climb. This is a good chance to slow down, sit over a meal and enjoy a different island atmosphere before the boat ride back.

The return sail: a new angle on Santorini’s cliffs

The trip back is part of the sightseeing, not just a transfer. From the water, you can take in the caldera’s layered rock and the high settlements above it. The route can pass along the coast near Oia before continuing toward Fira, giving you a fresh view of places you may already have seen from land.

This longer stretch of sailing is a chance to rest after the two shore walks. Find a seat with a view, listen to the commentary and keep a camera handy. A bar is available onboard for drinks at your own expense. Some boats have a roof deck, but seating and vessel details can vary, so bring sun protection rather than assuming you will be in shade.

The boat is not a private charter. It is a shared excursion, and departures can be full, though there is seating onboard. The appeal is the route and the variety of stops, not having a quiet boat to yourself. If you prefer a very small group or a purely relaxed sailing experience, this may not be the right format.

What the $41 price does and does not cover

At $41 per person, the trip offers a lot of variety for the price: boat transport between the islands, a guide, onboard audio commentary, the volcano stop, the hot-spring swim stop and free time on Thirassia. Optional hotel pickup and drop-off can make the day simpler, especially if you are not staying near Fira or do not want to arrange the port transfer yourself.

The headline price is not the full day’s cost. Add the €5 cash volcano entrance fee, meals and any drinks you buy onboard. The cable car to and from Fira Old Port is another optional expense at €12 each way. If you choose a donkey ride to Manolas, that is also at your own expense.

Even after those extras, this is a strong-value way to see the volcanic islands and travel around the caldera by boat. You are paying for several distinct experiences in one outing, rather than a single swim or a short sightseeing ride. The value is best if you plan to hike at Nea Kameni, make use of the Thirassia stop and enjoy the return sail.

Who will enjoy this trip, and who should think twice

This excursion suits you if you want active sightseeing, have a reasonable comfort level with walking and swimming, and would like to see more than Santorini’s main island. It works especially well for visitors who want a mix of geology, views and unstructured time for lunch. Families can join, but children must be accompanied by an adult, and infant seats are not available.

It is not wheelchair accessible and is not recommended for people with walking disabilities or anyone using a stroller. The uneven ground at the volcano and the steps on Thirassia make mobility a real factor, not a minor detail. If swimming in open water is outside your comfort zone, you can skip the spring swim, but you will miss one of the day’s main activities.

Bring comfortable shoes, swimwear, a towel, sunglasses, a hat, sunscreen and cash. Pets are not allowed. The tour offers free cancellation up to 24 hours in advance, and a reserve-now, pay-later option is available.

Should you book the Santorini caldera cruise?

Book it if you want a full, varied day and are comfortable with the volcano walk, an open-water swim option and a climb on Thirassia. The best parts are the contrast between Nea Kameni’s rough volcanic ground and the caldera views from the boat, plus the freedom to spend your island stop as you choose.

Think twice if you need step-free access, want a long soak in very hot water or prefer not to spend much time walking. For most active visitors, though, the price makes sense once you account for the included boat route and three very different stops. Plan for the extra fees, wear your swimsuit under your clothes and keep some cash handy.

FAQ

Where does the cruise meet?

The meeting point is the Santo Star Office at Fira Old Port. Meet at 10:15 am for the 10:30 am departure. If you book the pickup and drop-off option, the cruise departs from Athinios port at 9:45 am.

How long is the tour?

The cruise lasts six hours. Check the available starting times when booking, as they may vary.

Is the volcano entrance fee included?

No. The Nea Kameni entrance fee is €5 per person and must be paid in cash.

What should I bring for the hot-spring stop?

Bring swimwear, a towel and beachwear. Wearing your swimsuit under your clothes can save time, and a dark swimsuit is a sensible choice because the water may discolor lighter fabric. Foam pool noodles are provided.

Is the tour wheelchair accessible?

No. The tour is not wheelchair accessible and is not recommended for people with walking disabilities or anyone using a stroller. Uneven ground and a moderate amount of walking are involved.

Are food and drinks included?

No. Food is not included. Drinks are available to purchase from the onboard bar.