Santorini’s hot springs at Palea Kameni are heated by geothermal energy from the still-active volcano, keeping the water at 30–35°C year-round. The swim itself is free. The only real cost is the boat ride to get there.
Yes — if you book a group tour from Fira’s Old Port. From €30 per person you get the boat transfer, a guided hike on Nea Kameni, and time to swim in the springs. The main catch is the 50-metre open-water swim to the warm zone, which rules out very young children and weak swimmers.
The cheapest way in is the three-hour Volcano and Hot Springs Tour, which runs April to mid-November. It costs from €30 per person and includes the boat ride, a 75-minute hike on Nea Kameni’s volcanic trail, and about 30 minutes at the hot springs. You pay €5 extra for the volcano entrance fee and €10 each way for the cable car down to the Old Port if you don’t want to walk the 600 steps.
The half-day option, which costs 20–40 EUR per person, typically departs from Athinios port instead of Fira. That means you skip the cable car cost entirely. It also includes free time on Thirasia, a quieter island across the caldera where you can grab lunch away from the crowds.
Comparing Your Options
The table below lays out the main ways to reach the volcano and hot springs. Prices are per person and vary by season — May, June, and September offer the best balance of warm water and fewer boats.
| Tour Type | Price per person | Duration | What’s Included | Best For |
|---|---|---|---|---|
| Volcano & Hot Springs Tour | From €30 | 3 hours | Boat transfer, guided volcano hike, hot springs swim | Budget families with kids 8+; cable car cost adds €20 round-trip |
| Half-Day Volcano Tour | €20–40 | ~5 hours | Boat, volcano hike, hot springs, free time on Thirasia | Families with kids 6+; better pace, no cable car needed if departing Athinios |
| Caldera Cruise | €50+ | 5–9 hours | Boat, meals, hot springs stop, multiple island stops | Families wanting a full day with lunch included |
| Private Boat Charter | €100+ | Flexible | Private boat, flexible timing, fewer crowds at springs | Families who want quiet at the springs and can split the cost across a group |
One thing the table doesn’t capture: the half-day tour from Athinios requires getting your family to that port, which is a 20-minute drive from Kamari or Fira. If you’re staying in Oia or Imerovigli, the Fira departure may be simpler despite the cable car cost.
What You Actually Do
The boat drops anchor about 50 metres from Palea Kameni’s shore. You jump into cold open water — the first shock fades fast — and swim toward the geothermal vents near the rocks, where the water warms noticeably. The warmest zone sits close to the shore. Most people stay in for 20–30 minutes before swimming back to the boat. The whole swim, out and back, takes 30–45 minutes.
On Nea Kameni, the trail passes steaming craters and gives wide views across the caldera to Fira’s white cliff edge. The ground is loose volcanic rock, so sturdy shoes matter. Guides usually stop at the main crater for 10–15 minutes and point out the different eruption layers.
Wear dark or old swimwear — the iron and sulphur minerals stain fabric orange-brown, and the colour doesn’t always wash out. Rinse off as soon as you’re back on the boat.
Making It Work with Kids
The volcano hike itself is rated easy and works for children who can walk on uneven ground for an hour. The swim is the real constraint. A child who isn’t confident in open water will struggle with the 50-metre distance, especially the cold initial stretch. Life jackets are often available on board, but bringing your own gives you one less thing to worry about.
Water shoes help with the volcanic rock near the hot springs shore, and a towel is essential — most budget tours don’t provide one. The springs are busiest between 11:00 and 14:00, so morning tours (the 11:00 departure is standard) or late-afternoon options in high season mean fewer people in the water.
For families based in Kamari — widely considered the best family base on Santorini — the half-day tour from Athinios is the most practical choice. Kamari has shallow-entry beaches, a long flat promenade, and plenty of tavernas that handle children well, which makes it a good home base for the rest of your stay.
The 50-metre swim starts in cold water, and young children can get distressed. If your child isn’t a strong swimmer, skip the hot springs portion and stay on the boat — the volcano hike alone is worth the trip.
What About Independent Travel?
There is no public ferry to Palea Kameni. An organised tour or private boat is the only way to reach the hot springs. If you’re already booked on a caldera cruise, the hot springs stop is usually included — check the itinerary before adding a separate tour.
Is the hot springs swim safe for a six-year-old?
It depends on the child. The water is warm near the vents but cold during the swim out. Sofia uses a life jacket and stays close to Julien. If your child isn’t confident in open water, keep them on the boat — the volcano hike is the better part of the trip for younger kids anyway.
What’s the real total cost for a family of three?
A half-day tour from Athinios at €35 per person plus the €5 volcano fee each comes to roughly €120 for two adults and one child, assuming the child pays full fare. Some operators discount children under 12 — check individual tour pages for age policies.
Can we avoid the cable car cost?
Yes — choose a tour that departs from Athinios port instead of Fira’s Old Port. The half-day option usually does. If you’re staying in Kamari or Perissa, Athinios is actually closer than Fira.
When should we go to avoid the crowds?
Morning tours (11:00 departure) are less crowded than afternoon ones. May, June, and September offer warm water without July and August’s peak crowds. Most tours stop running by mid-November because the cold swim becomes unappealing.
What should we pack?
Dark swimwear, a towel, water shoes, a life jacket for weak swimmers, sunscreen, a hat, and a change of clothes. The boat has limited shade, so bring more sun protection than you think you need.
The volcano and hot springs offer one of the few experiences on Santorini that feels genuinely adventurous rather than staged. The low cost isn’t a compromise — it cuts out the extras and leaves just the geology, the swim, and the view. For a full breakdown of the island, including family accommodation and day-by-day planning, head to the Santorini destination guide.
Sources and further reading
Santorini Hot Springs — Complete Guide. Day Trips from Santorini, 2024.
Santorini Volcano and Hot Springs Tour. Santorini Experts, 2024.
Santorini with Kids — Complete Family Guide. Discover Cyclades, 2024.
