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

Santorini’s most dramatic sights are not all on the cliff tops. This three-hour boat trip takes you across the caldera to black volcanic islands, where you can walk among Nea Kameni’s rough craters and swim near the thermal waters of Palea Kameni. I like the compact format and the chance to see Santorini from the water, but the advertised price does not include every cost you will face.

I especially like the 90-minute stop at the volcano, which gives you time for more than a quick photo. I also like that the boat spends about 30 minutes at the hot springs, rather than simply passing the bay. The main catch is access: you must reach the Old Port by cable car or by tackling 587 steps, and the swim is not suitable for weak swimmers.

Key points before you book

• Nea Kameni gets the longest stop: You have about 1 hour and 30 minutes to follow the trail toward the volcanic craters.
• The water may only feel warm: Palea Kameni’s bay is warmer than the open sea, but it is not guaranteed to feel hot, especially outside the warmest season.
• The hot spring swim requires strength: You must swim a considerable distance to reach the shore area.
• The listed price is not the final cost: Add the €5 volcano entrance fee and port access by cable car, currently €10 each way.
• The Old Port sits far below Fira: You can use the cable car or walk down 587 steps, but the return route can be demanding.
• The tour is short and focused: It suits you best if you want volcanic scenery and a swim without giving up an entire day.

Starting below Fira at the Old Port

The trip begins at Santorini Old Harbor, also called Gialos, directly below Fira. You first need to get down the cliff. The cable car takes about three minutes and costs €10 per person each way, or €20 for a return trip. That fee is separate from the boat ticket.

Walking down is free, but the route has 587 steps. You will pass steep walls, caldera views, and the famous cave houses clinging to the cliffs above. It can be a memorable way to reach the water, but it is not an easy shortcut for everyone.

Allow extra time at the top. The meeting point is the Santo Star travel office at the port, where you collect your ticket and receive final instructions. The boat leaves at 11:00 in the morning or 14:15 in the afternoon, depending on the departure you choose.

The timing matters. The morning trip gives you more of the day afterward, while the afternoon departure may fit better if you are already spending the morning in Fira. Either way, you should arrive at the meeting point with time to spare. The port is small, and the cable car line can affect your schedule.

The 15-minute crossing to the volcano

Once aboard, you make a roughly 15-minute ride across the caldera to the volcano bay. This is one of the best parts of the trip for anyone who wants a new view of Santorini. From the water, the island’s high cliffs and white buildings appear above you, while the volcanic islands feel stark and close.

The boat ride is not a long sightseeing cruise. It is transportation between the stops, with the main value coming from the changing view and the chance to see the caldera from sea level. You will want your camera ready, but keep your hands free enough to manage the walk and the later swim.

An English-speaking guide provides information before boarding and during the activity. No individual guide names are provided, so you should not expect to book a particular person. The group size is not specified either, which means the feel of the boat may vary by departure.

Hiking Nea Kameni’s volcanic craters

Nea Kameni is the main stop, with about 90 minutes on the island. You can follow the trail toward the top and see the active craters up close. The ground is volcanic and rugged, and the experience is more about raw earth, views, and geology than polished attractions.

I like this generous time allocation. A short landing would reduce the volcano to a photo stop, but an hour and a half lets you walk at a reasonable pace, pause for views, and look closely at the crater area. You do not need to race straight back to the boat after taking one picture.

At the same time, keep your expectations realistic. Nea Kameni is not a lush island with a long list of sights. It is a stark volcanic outcrop shaped by eruptions. The appeal comes from standing on the dark ground and seeing the effects of volcanic activity at close range.

Wear shoes with a firm sole. The information provided does not specify trail conditions in detail, but this is a hiking stop, not a paved promenade. Bring water, protect yourself from the sun, and avoid carrying anything you do not want to manage on uneven ground.

The €5 volcano entrance fee is not included. This is an easy charge to overlook when comparing tour prices, so include it in your budget before booking. At $35, the boat trip can look inexpensive at first, but the added costs affect its real value.

What makes the volcano stop worthwhile

Santorini is famous for its caldera, but many visitors only see it from Fira, Oia, or a hotel terrace. Nea Kameni gives you a closer look at the volcanic force that shaped the island group. The scenery is not soft or green. It is rough, black, and exposed, with the sea and cliffs providing the contrast.

The stop also adds movement to a Santorini day. You are not simply riding around for a view. You are walking on the island, climbing toward the craters, and seeing the caldera from a different angle.

I would rate this portion higher for people interested in geology, natural scenery, and active sightseeing. If your ideal boat trip means lying in the sun with a drink, the 90-minute hike may feel like work. The tour gives you a choice to follow the trail, but the main purpose of the stop is clearly exploration on foot.

Swimming at Palea Kameni’s thermal bay

After Nea Kameni, the boat continues to Palea Kameni and the small bay of Agios Nikolaos. This is where the hot springs and mud baths formed by volcanic activity are found. The boat remains for about 30 minutes, giving you time to swim in the thermal water.

Do not expect a hot pool in the usual sense. The water temperature changes with the season and is generally warmer than the surrounding sea, but it may feel only mildly warm. A late October visit, for example, may not produce the steamy experience you imagine. The water can also be less appealing when the surrounding sea is cool.

The swim has an important safety point. You must be a strong, skilled swimmer because you need to swim a long distance to reach the shore. This is not a gentle step from the boat into a shallow bathing area. If you are unsure in open water, stay on the boat and enjoy the view instead.

The 30-minute stop is enough for a swim, but not for a long soak. You will need to get changed or dry off afterward, so bring a towel. Towels are not provided. A swimsuit, towel, sun protection, and a small waterproof bag make sense for this part of the day.

The mud baths are part of the area’s appeal, but the supplied details do not promise a specific mud-bath setup or treatment. Think of the stop as a swim near volcanic hot springs, not as a full spa visit.

Is the three-hour schedule enough?

For a focused outing, yes. The schedule gives you approximately 15 minutes by boat to the volcano, 90 minutes on Nea Kameni, 30 minutes at the thermal bay, and the return ride to Fira’s Old Port. That is a tidy way to see two volcanic islands without spending a full day on the water.

The short duration also means there is little spare time. Delays getting to the port, a slow cable car line, or a late return from the crater trail can make the schedule feel tight. Follow the guide’s instructions and return to the boat on time.

The trip does not provide a full Santorini island tour. It does not replace time in Fira, Oia, or the island’s villages. Its purpose is narrower: volcanic scenery, a crater walk, and a thermal-water swim.

The overview associated with the experience refers to Thirassia village, but the detailed route provided for this departure does not include a timed stop there. I would not book this trip expecting to explore Thirassia. The clearly described stops are Nea Kameni and Palea Kameni.

The real price: more than $35

The base price is $35 per person. That is reasonable for a three-hour boat outing with a 90-minute volcano stop and a swimming stop, especially if you value seeing the caldera from the water.

You must also account for:

• €5 for the volcano entrance
• €10 each way for the cable car, or €20 round trip
• A towel, which you need to bring yourself

That adds €25 in listed fees if you use the cable car both ways. Currency differences make an exact final total difficult to state, but the key point is simple: the headline price is not the complete outing cost.

You can walk down the 587 steps instead of using the cable car, but that does not always make the return simple. Access conditions can change, and one recent booking experience included a situation where the steps were closed for the climb back up. I would budget for the cable car unless you are fully prepared for a steep walk and have confirmed the route is open.

The value is strongest if you plan to use both main stops. If you do not want to hike or swim, you are paying for activities you may not use. On the other hand, the boat ride, volcanic scenery, and flexible reserve-now, pay-later option can make it a useful choice for a half-day Santorini plan.

Who will enjoy this boat trip most?

I would choose this outing if you want a clear taste of Santorini’s volcanic side and prefer a short schedule. It suits active adults, couples, older children who can manage the hike, and anyone who wants more than a view from the cliff edge.

It is less suitable if you have difficulty with steep steps, uneven hiking, or open-water swimming. The volcano walk is optional in the description, but reaching the port itself can be physically demanding. The hot spring swim is optional in practice, yet only strong swimmers should attempt it.

It also suits people who like having two different experiences in one outing. Nea Kameni is dry, rugged, and active. Palea Kameni is about water, warmth, and relaxation. The contrast gives the short tour a good rhythm.

Practical advice for a smoother day

Bring a towel, swimwear, sturdy shoes, water, and sun protection. You should also carry only what you need, since a bulky bag becomes awkward on the crater trail and around the boat.

Choose your departure based on your wider day. The 11:00 trip leaves the afternoon open, while the 14:15 departure may work after a morning in Fira. Check availability for the exact start time before booking.

Plan the port transfer first. The boat cannot help if you arrive late because of the cable car or the steps. Give yourself time to reach the Santo Star office, collect your ticket, and listen to the guide’s instructions.

If you want to swim, be honest about your ability. You may find the water pleasantly warm, or you may find it only slightly warmer than the sea. The experience is not worth taking a safety risk.

Free cancellation up to 24 hours in advance and the option to reserve without paying immediately are useful if your Santorini plans may change. The live guiding is in English.

Should you book the Santorini volcano and hot springs trip?

I would book it for a compact introduction to Santorini’s volcanic islands, especially if you want a real walk on Nea Kameni rather than a boat ride with only photo stops. The 90-minute crater visit is the strongest part, and the thermal-water stop adds a pleasant change of pace.

I would skip it if the extra port and entrance fees stretch your budget, if you dislike steep access routes, or if you are not a confident swimmer. Go in knowing that the springs may be warm rather than hot, and that the full outing costs more than the $35 starting price.

For the right person, this is a practical half-day addition to a Santorini stay: active, scenic, and short enough to leave room for Fira afterward.

FAQ

Where does the boat trip start?

It starts at Santorini Old Harbor, also called Gialos, below Fira. Go to the Santo Star travel office at the port to collect your ticket and receive final instructions.

How do I reach the Old Port?

You can take the cable car from Fira. The ride takes about three minutes and costs €10 per person each way. You can also walk down 587 steps.

What time does the tour depart?

Departures are scheduled at 11:00 in the morning and 14:15 in the afternoon. Check availability for the exact date and time you want.

How long is the activity?

The boat trip lasts about three hours.

How much time do I get at Nea Kameni?

You have approximately 1 hour and 30 minutes at the volcano. You can follow the trail toward the top and see the craters.

Is the volcano entrance fee included?

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

Are the hot springs truly hot?

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

Do I need to be a strong swimmer?

Yes, if you choose to swim at the hot springs. You must swim a long distance to reach the shore, so the activity is intended for strong and skilled swimmers.