From Old Port:Volcanic Islands Boat Trip & Hot Spring Visit

Santorini’s volcanic heart is only a short boat ride from Fira. This three-hour trip takes you across the caldera to Nea Kameni, where you can walk among dark volcanic craters, then continues to Palea Kameni for a swim in mineral-rich water. It is a simple way to see the islands that shaped Santorini.

I like the 90-minute stop at Nea Kameni, since you have enough time for the uphill trail, crater views, and photographs without being rushed. I also like the contrast between the dry, black volcanic ground and the warm bay at Agios Nikolaos. The main drawback is cost clarity: the advertised $35 price does not include the €5 volcano entrance fee or the €10 cable-car ride each way.

Key points to know before booking

• Nea Kameni gets the longest stop: You have about 1 hour and 30 minutes to hike toward the active craters and take in the caldera views.
• The hot springs are warm, not guaranteed hot: Water temperature changes with the season, and one October visit found the water disappointing rather than truly hot.
• The swim is not a quick dip from the boat: Strong, capable swimmers must cover a long distance to reach the shore.
• The Old Port adds expense and effort: You can use the cable car for €10 each way or walk the 587 steps.
• The boat ride is part of the pleasure: The journey from Fira to the volcano bay takes roughly 15 minutes.
• The advertised fare is not the full budget: Add €5 for volcano entry, cable-car costs, and bring your own towel.

A short boat ride from Fira to a volcanic world

The trip begins at Santorini Old Harbor, also called Gialos, below Fira’s white cliffside buildings. You meet at the Santo Star travel office near the port, collect your ticket, and receive final instructions before boarding.

The harbor is reached by cable car or by foot. The cable car takes about three minutes and costs €10 per person each way. If you walk, you face 587 steps down the cliff. The descent gives you fine views over the caldera, but the return climb can be hard, and access to the steps may not always be open. For most people, the cable car is the practical choice, but it adds €20 to the round-trip cost.

The boat ride to the volcano bay takes about 15 minutes. That short crossing gives you a close look at the steep volcanic cliffs around Santorini and helps explain why this is more than a standard sightseeing cruise. You are heading into the remains of eruptions that changed the shape of the island.

Departures are scheduled at 11:00 in the morning and 14:15 in the afternoon. The afternoon option may work better if your morning is tied up in Fira, but you should allow enough time to reach the Old Port. The tour lasts three hours, so it fits neatly into a half-day plan.

The tour is conducted in English. The guide welcomes you at the harbor and gives the necessary information before the boat leaves. No guide names are provided, so you should not expect a named private guide experience. This is a shared excursion built around the boat route and scheduled stops.

Nea Kameni: walking across Santorini’s active volcanic island

After the boat reaches the volcano bay, you have about 90 minutes at Nea Kameni. This is the main stop, and it is where the trip feels most distinctive.

The island is made of dark volcanic rock, with a trail leading uphill toward the craters. You can follow the path to see the active volcanic areas at close range. The walk is not presented as a long expedition, but it is still a hike over uneven, exposed ground. Wear sturdy shoes, bring water, and expect strong sun.

The reward is the setting. From the higher parts of the trail, you can look back toward Santorini and the surrounding caldera while standing on land formed by volcanic eruptions. The experience is less about polished scenery and more about seeing raw earth, rock, and steam-related volcanic features in a place that still feels geologically alive.

You should keep your expectations in check. Nea Kameni is not a lush island filled with monuments or a large archaeological site. The attraction is the walk itself, the unusual rock, and the chance to see volcanic craters in a dramatic setting. If you enjoy geology and open-air scenery, the stop earns its place. If you want a relaxed boat ride with little walking, the 90 minutes may feel long.

The stop also gives you time to take photographs. The contrast is strong: black rock below, bright sea around you, and Santorini’s high cliffs in the distance. The trip’s highest value comes here because you get time to leave the boat and see the volcanic ground rather than simply cruise past it.

The volcano entrance fee is €5 and is not included. This is a small extra cost, but it matters because the low advertised fare can make the full price look cheaper than it really is. Add it to the cable car, and the total cost can rise quickly.

Palea Kameni and the 30-minute hot-spring stop

After Nea Kameni, the boat continues to Palea Kameni, home to the hot springs and mud baths associated with Santorini’s volcanic activity. The boat remains near the small bay of Agios Nikolaos for about 30 minutes.

The water is generally warmer than the open sea, but it is not reliably hot. Temperature changes with the season, and cooler weather can make the difference less striking. In late October, the water was described as not actually hot, which is useful to know if you are booking this mainly for a thermal soak.

The swim also requires care. You do not simply step from the boat into shallow water beside the beach. Strong and skilled swimmers need to cover a long distance to reach the shore. That makes this stop unsuitable for anyone who is not confident in open water or who tires easily.

If you do swim, bring a towel and expect volcanic sediment or mud around the bathing area. The water may offer a pleasant, unusual break after the hike, but it is best viewed as a warm-water swim rather than a full spa treatment. The 30-minute time limit keeps the schedule moving, though it gives you little room to hesitate.

Many people may choose not to enter the water, especially outside the warmer months. That is not a problem, since you can remain on the boat and enjoy the views, but it changes the value of the stop. If swimming is your main reason for booking, check the season and water conditions before you commit.

What the three-hour schedule really gives you

The timing is tight but sensible. About 15 minutes gets you from the Old Port to the volcano bay. You then have 90 minutes on Nea Kameni, 30 minutes at the hot springs, and the remaining time for boat travel and boarding.

That structure puts the emphasis on two activities: walking and swimming. There is no long stop for a meal, no extended village visit, and no broad sightseeing loop around the islands. The supplied description refers to Thirassia village, but the detailed route described here does not include a separate stop there. You should book this trip for Nea Kameni and Palea Kameni, not for an extended visit to Thirassia.

The schedule works well if you want a focused volcanic excursion from Fira. It is less suitable if you want a slow cruise with plenty of time to sit on deck. The boat is a means of reaching the stops, though the 15-minute crossings still offer good views of the caldera.

The 11:00 departure gives you a straightforward morning-to-afternoon outing. The 14:15 departure is useful if you prefer a later start, but you will spend part of the afternoon on the water and at the volcanic sites. Check the available departure time when booking, since the activity information lists both times but advises you to confirm availability.

Price, extra fees, and overall value

The listed price is $35 per person. At first glance, that is an affordable way to reach Santorini’s volcanic islands. The value is strongest if you want both the crater walk and the hot-spring stop in one short outing.

The true cost is higher. You need to budget for:

• $35 tour price per person
• €5 volcano entrance fee
• €20 round-trip cable car per person, if you use it
• Your own towel and personal drinks or supplies

That can make the outing feel closer to €55 per person once the main extras are counted, depending on the exchange rate and booking price. The cable car is not technically part of the tour, but for many people it is the realistic way to reach the harbor and return to Fira. That cost should be treated as part of the day’s transport budget.

This does not make the trip poor value. A boat ride, a 90-minute visit to the volcanic island, and a hot-water swim in three hours can still be a fair deal. The issue is transparency. You should know the full likely spend before booking so the low starting price does not surprise you later.

The tour offers free cancellation up to 24 hours before departure and allows you to reserve now and pay later. Those policies help if your Santorini plans depend on weather or changing cruise schedules, but they do not remove the extra on-site fees.

Practical preparation for the volcano walk and swim

You need a towel. That simple item is not supplied, and you will want one if you enter the water.

For Nea Kameni, wear shoes suited to a rocky trail rather than sandals with a loose sole. The route leads uphill, and the ground is exposed. Carry water and protect yourself from the sun, though the tour information does not specify whether shade is available.

For Palea Kameni, take the swimming warning seriously. You must be a strong swimmer to cover the long distance to the shore. If you are not confident in open water, you can skip the swim and remain on the boat, but the stop will then be mainly a scenic pause.

The boat route does not allow pets. The activity is offered in English, and the guides provide instructions before boarding. You should arrive at the Santo Star office at the Old Port with enough time to collect your ticket and locate the boat.

Getting down to Gialos is part of the experience, but it can complicate the day. The cable car is quick. The steps are free, yet 587 steps down and an uphill return require a level of fitness that not everyone has. Confirm the return arrangements locally, especially if you are considering walking back.

Who will enjoy this Santorini volcano trip?

I would recommend this trip to you if you want a compact, active outing from Fira. It suits people who like seeing natural features at close range, do not mind a short hike, and are comfortable with a basic boat excursion rather than a luxury cruise.

It is especially good for a first visit when you want to understand Santorini’s volcanic shape without giving up an entire day. The combination of geology, views, and swimming gives the trip more variety than a simple boat transfer.

You may want to skip it if you dislike uneven walking, hot sun, or open-water swimming. The hot springs are not guaranteed to feel hot, and the hike is the main event. Anyone expecting a polished spa stop or an easy swim right beside the boat could be disappointed.

The overall rating of 4.4 from 195 reviews suggests a generally positive experience, and the strongest parts are easy to understand: the boat ride, the volcanic setting, and the chance to combine two different activities. The weaker points are also clear: added costs and water that may be only mildly warm.

Should you book this boat trip?

Book it if you want a short, active introduction to Santorini’s volcanic islands and you are comfortable adding the cable car and entrance fees to the advertised price. The Nea Kameni hike is the most dependable part of the experience, while the hot springs are a bonus that depends on season and your swimming ability.

Before booking, set aside around €25 in extra transport and entry costs if you plan to use the cable car. Bring a towel, sturdy shoes, and water. Choose this trip for the craters and caldera views first, and the thermal swim second. That expectation gives you the best chance of finding the outing worthwhile.

FAQ

Where does the tour start?

The tour starts at Santorini Old Harbor, also called Gialos, below Fira. You collect your ticket and receive final instructions at the Santo Star travel office near the port.

How do I reach the Old Port?

You can take the cable car, which takes about three minutes and costs €10 per person each way. You can also walk down 587 steps, although the return climb is much more demanding.

How long is the tour?

The full activity lasts about three hours. The visit to Nea Kameni lasts about 1 hour and 30 minutes, and the stop at the hot springs lasts about 30 minutes.

Is the volcano entrance fee included?

No. The volcano entrance fee is €5 and must be paid separately.

Are the hot springs actually hot?

The water is generally warmer than the surrounding sea, but its temperature changes with the season. It may feel only mildly warm rather than truly hot.

Do I need to be a strong swimmer?

Yes, if you plan to swim at the hot springs. You must cover a long distance to reach the shore, so the activity specifies that swimmers should be strong and skilled.