Petriolo thermal baths: how to get there
The Petriolo thermal baths are one of the most authentic hot spring experiences in Tuscany. Unlike the more commercialised thermal resorts of Bagno Vignoni or Saturnia, Petriolo retains a raw, natural feel. The water flows directly from the ground at around 43 degrees Celsius and collects in natural pools along the banks of the Farma river.
They are about 80 km from Barberino Val d’Elsa, roughly 70 minutes by car. An easy day trip, especially in cooler months when the outdoor steam rising from the water creates a genuinely atmospheric experience.
The Petriolo thermal baths
Petriolo is located in the valley of the Farma river, in the hills between Siena and Grosseto. The springs emerge from the riverbank at a constant temperature of 43 degrees. The water is sulphurous, with a high mineral content that is traditionally considered beneficial for skin and joint conditions.
The site was used in Roman times and remained active through the medieval period. Pope Pius II, the same pope who built Pienza, reportedly visited the Petriolo waters in the 15th century.
The baths divide into two areas: the natural free pools along the river, and the managed Terme di Petriolo complex on the hillside above. The two experiences are quite different, and you can choose one or both depending on what you are looking for.
The natural area is rustic, unpretentious, and genuinely popular with local Tuscans. On a busy summer weekend you will share the pools with families, young people, and regulars who come every week. On a quiet weekday in autumn you may have a pool almost to yourself.
Natural and equipped pools
The natural pools at Petriolo are free to use. They are accessible via a path that descends from the car park to the river. The walk takes about 10 minutes. The path can be muddy after rain.
The pools are essentially natural basins where the thermal water collects before flowing into the Farma river. The water temperature varies by pool and by distance from the source. The hottest pools near the spring are around 40 to 43 degrees. Moving downstream, the temperature gradually drops.
There are no changing rooms, lockers, or facilities in the natural area. Bring a towel, water shoes (the river bed is rocky), and something to sit on. The ground around the pools is uneven and slippery from the mineral deposits.
The Terme di Petriolo complex on the hill above is the managed facility. It offers indoor and outdoor pools with regulated temperature, changing rooms, towel rental, a bar, and a restaurant. The facility is operated as a proper thermal spa.
Day access to the Terme di Petriolo complex costs around 20 to 30 euros per person depending on the day and season. The facility is open daily in summer. In winter the outdoor pools may have reduced hours. Always check current hours on the official website before visiting.
The spa also offers thermal treatments: mud baths, inhalation therapy, and massages. These require prior booking and cost additional fees, typically 30 to 60 euros per treatment.
How the visit works
A practical visit to Petriolo works best if you combine the natural pools with the managed facility, or choose one based on your preferences.
If you prefer the free natural experience, plan to arrive early. Weekends in July and August can be extremely crowded in the natural area, with 200 or more people sharing the pools. Weekday visits in spring or autumn are far more relaxed.
For the natural pools, a morning visit is ideal. Arrive by 9:00 or 9:30. Spend two to three hours in the water. Bring a picnic lunch and eat by the river. The drive back to Barberino Val d’Elsa takes about 70 minutes.
If you prefer the managed facility, the experience is more comfortable but less spontaneous. The indoor pools are excellent in winter, when the outdoor steam is dramatic and the natural pools are cold outside the thermal zones.
Some visitors do both: spend the morning at the managed facility for treatments, and the afternoon at the natural pools for a more casual soak. This requires a full day but is a deeply relaxing experience.
Prices and hours 2026
For the Terme di Petriolo managed facility in 2026, day access prices are approximately:
Standard day pass: 22 euros (weekdays) / 28 euros (weekends).
The facility typically opens at 9:00 and closes at 19:00 in summer. In winter hours are reduced, usually 10:00 to 17:00. The spa and treatment areas may have different hours.
Thermal treatments must be booked in advance by phone or on the official website. The facility’s phone number and reservation system are listed on termepetriolo.it.
For the natural free pools, there is a car park at the site entrance. Parking costs around 3 euros per day or 2 euros for up to four hours. The path to the natural pools is signposted from the car park.
Note that prices and hours can change between seasons. Always verify on the official website before planning your visit.
How to get there from Barberino Val d’Elsa
Petriolo is about 80 km from Barberino Val d’Elsa. By car the drive takes around 70 minutes.
The most direct route goes south on the SR2 through Poggibonsi and Siena, then continues south-east on the SS223 (the Palio road) towards Grosseto. After about 25 km on the SS223, you turn right towards Petriolo following local signs. The thermal baths are in the Farma valley below.
An alternative route avoids the SS223 by taking the SR73 through Murlo and the Farma valley. This is a scenic option but involves more winding roads.
There is no practical public transport option from Barberino Val d’Elsa to Petriolo. A car is essential.
The road to Petriolo’s car park is unpaved for the last 500 metres. Most standard cars handle it without difficulty, but ground clearance matters if the road is wet.
The best time to visit Petriolo is late September to November for the most atmospheric steam, comfortable temperatures, and fewer crowds. Spring (April to May) is also excellent.
Where to stay
Sogno d’Oro is set in the Val d’Elsa landscape near Barberino Val d’Elsa. After a day at the thermal baths, returning to a quiet countryside guesthouse is a natural continuation of the relaxation.
The drive from Petriolo back to Barberino takes about 70 minutes, mostly through empty Sienese countryside. It is a peaceful end to a slow day.
