Santorini Caldera Cruise: Volcano Hike & Hot Springs Swim

Three Islands, One Boat: Santorini's Volcano, Thermal Waters & Hidden Village

You hike a volcanic island with a guide who explains its eruption history, swim in warm sulfur springs 30 to 40 meters from the boat (with foam noodles provided), and explore the quiet village of Thirassia before returning. Pickup from Athinios Port is included if selected. Otherwise, meet at the Old Port in Fira. Bring sturdy shoes, water, and sunscreen for the volcano. Dark swimwear for the springs. The whole experience runs about half a day.

Step-by-step itinerary

Stops and time spent at each

1. Santorini Volcano1h 30m
2. Thirasia2h

Volcano hike, hot springs swim, Thirassia visit

• Arrive at Santorini volcano
• Hike volcanic trails with guide
• Pay 5€ entrance fee
• Enjoy panoramic caldera views
• Return to boat
• Sail to Palea Kameni hot springs
• Swim 30-40 meters to springs
• Relax in warm sulfur waters
• Return to boat
• Travel to Thirassia island
• Explore traditional villages
• Enjoy views or swim
• Dine at local taverna
• Return to starting port

The experience

There's a moment when the boat cuts through the caldera and you see the volcano rise up in front of you (all black rock and jagged edges), and you realize this isn't a postcard anymore. It's real, and you're about to walk on it. The Santorini caldera cruise starts at either Athinios Port (with pickup) or the Old Port in Fira, and from there the boat heads straight toward the volcanic island. Your tour escort meets you on board and walks you through what's coming: a 1.5-hour hike on the volcano itself, a swim in sulfur-rich hot springs 30 to 40 meters from the boat, and time to wander Thirassia, a quieter island across the water. It sounds like a lot, but the rhythm works.

The volcano stop is where the day gets physical. You'll pay a 5€ entrance fee to access the trails, and then you're climbing (not steeply, but steady) over volcanic rock that's still warm under your feet in places. Your escort talks about the eruptions, the geology, what happened here centuries ago, and it makes the landscape make sense instead of just looking alien. The summit opens up to views of the entire caldera and the Aegean beyond, and the steam vents and rock formations are the kind of thing you don't forget. Wear sturdy shoes (they mean it), bring water, a hat, sunscreen. The hike is moderate, not extreme, but you're moving for the full 1.5 hours.

After the volcano, the boat anchors near Palea Kameni and you swim to the hot springs: about 30 to 40 meters, which sounds short until you're in the water and the distance feels longer. The springs are warm, sulfur-rich, and the water has an orange tint from the minerals. Foam noodles are provided if you want them. This part isn't for everyone. It requires confidence in the water and real swimming ability, not just floating. If you're a strong swimmer, it's a strange, quiet moment. Just you, the thermal water, the volcanic landscape. If you're not comfortable with that distance or the open water, you can stay on the boat. Dark swimsuits help avoid sulfur stains, which is a practical detail worth knowing.

Thirassia is the last stop, and it's the slowest part of the day. The island has traditional villages, narrow streets, views back toward Santorini, and a few tavernas where you can eat. Some people swim off the rocks, some sit and drink coffee, some eat lunch. There's no schedule here. You have time to choose what you want. The boat returns you to your starting port, and the whole thing takes a half day, which means you're back with time left in the afternoon.

What’s included

• Guided volcano hike with tour escort sharing geological history and eruption stories.
• volcano entrance fee (5€, paid separately).
• foam noodles for support during hot springs swim.
• visit to Palea Kameni hot springs with 30 minutes in the thermal waters.
• time to explore Thirassia island, including traditional villages and tavernas.
• pickup and drop-off from Athinios Port (if the "with pickup" option is selected).
• minibar on board with water and snacks.

Options for this experience

2 options

Without pickup and drop-offGuide in English or Greek · 10:30Pickup is not included. With this option, the tour starts at the Old Port of Fira, which you can reach by cable car or by walking down the steps.

Includes pickup and drop-offGuide in 5 languages · 09:45Pickup is included. Under this option, the tour starts at Athinios Port, and pickup can be arranged from designated spots close to your hotel.

You pick the guide language when booking.

You'll see the exact price of each option when you check availability.See dates and prices

Before you book

Days and timesEvery dayDepartures at 09:45 and 10:30Last departure this season: 7 Nov

Book up to2h before

AgesAdult (13 and older) · Child (5 to 12 years) · Infant (under 5): free

GroupUp to 130

Live guideEnglish, Spanish, French, Italian and Greek

Meeting point and pickupHotel pickup is optional; you can also go straight to the meeting point. Ends back at the starting point.

Cancellation and refundsFree cancellation up to 24 h before the start. After that, no refund.It may be canceled due to bad weather. If that happens, you're offered another date or a refund.

Paid on site€ 15

Prices and times updated today

Good to know

Moderate physical effort

Operated by Caldera's Boats Santorini Sea Excursions

Is this one for you?Book this if you want to see Santorini's volcanic landscape and swim in thermal springs without arranging your own boat or timing three separate stops. The fixed itinerary handles the logistics, and the tour escort guides you through the hike so you understand what you're looking at.

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Top questions

What languages is the tour guided in?

In English and Greek, at 09:45 and 10:30. In Spanish, French and Italian, at 09:45.

Can children come?

Yes. Ticket types: Child (5 to 12 years); Infant (under 5): free.

What happens if it rains?

It may be canceled due to bad weather. If that happens, you're offered another date or a refund. Free cancellation up to 24 h before the start.

Do I need to be a strong swimmer for the hot springs?

Yes. The boat anchors 30 to 40 meters from the springs, and you swim that distance to reach the water. Foam noodles are provided, but this activity is recommended only for confident swimmers due to the distance and open water.

What's included in the price?

Guided volcano hike with your tour escort, entry to the volcano (5€ fee separate), foam noodles for the hot springs, visit to Thirassia, and pickup/drop-off if you select that option. A minibar with water and snacks is available on board.

How long is the volcano hike?

About 1.5 hours on the volcanic trails. It's a moderate hike with steady climbing, but you're rewarded with panoramic views of the caldera and Aegean Sea from the summit.

Can I skip the hot springs swim?

Yes. If you're not comfortable swimming that distance or in open water, you can stay on the boat while others swim. The hot springs stop lasts about 30 minutes.

What should I wear and bring?

For the volcano: sturdy shoes, a sun hat, water, and sunscreen. For the hot springs: a dark swimsuit (to avoid sulfur stains) and a light jacket or extra layer if it's windy. Bring a light jacket or extra layer in case it's windy.

Is there time to eat on Thirassia?

Yes. You have free time on Thirassia to explore villages, swim, or eat at a traditional taverna. There's no fixed meal schedule, so you choose how to spend that part of the day.

What if I have a medical condition?

Swimming in the hot springs is not recommended for pregnant individuals or those with heart conditions or serious medical issues. Speak with your tour escort before the day starts if you have concerns.

Do I need to book pickup, or can I meet the boat myself?

Both options are available. You can choose pickup from Athinios Port, or meet the boat at the Old Port in Fira without pickup.