Caldes de Montbui sits 35 kilometres from Barcelona on top of a spring that comes out of the ground at 74 degrees, and that single fact separates a balneario from a spa. One uses water that arrives already hot from underground; the other heats it.
In Caldes de Montbui the spring comes out at 74 degrees, and the town’s public baths charge 7 euros to get in, which is less than most stops on a train day trip from Barcelona.
Where can you find thermal water near Barcelona? In four spring towns: Caldes de Montbui, La Garriga, Arenys de Mar and Caldes de Malavella. The municipal bath in Caldes charges 7 euros, hotel thermal circuits run around 34, and the water at the Font del Lleó spring reaches 74 degrees, the hottest in the Iberian Peninsula.
Which one to pick, in order
Five thermal towns sit within reach of Barcelona and they suit different days, so the choice comes down to budget, whether you have a car and who is coming with you. Prices here run from 7 euros at the municipal baths to 34.83 for a two-hour hotel circuit.
- You want the cheapest real thermal water — Banys Termals El Safareig in Caldes de Montbui, 7 euros, Wednesday to Sunday.
- You want a full circuit and you have no car — Blancafort in La Garriga, 34.83 euros, straight off the Rodalies R3.
- You are travelling with children — Blancafort again, the only one here with a published kids window, 10:00 to 16:00 for ages 4 to 13.
- You want the sea as well — Balneari Titus in Arenys de Mar, on the R1 coastal line.
- You have a whole weekend — Caldes de Boí or Rocallaura, both in Lleida and both mountain trips.
What you are actually paying for
The word covers something specific in Spain. A balneario draws mineral water from its own spring and is regulated around that water. A city spa heats and treats mains water, which is a different product at a similar price.
That matters for a visitor because the two are easy to confuse when booking online, and only one of them requires leaving Barcelona. If a treated-water circuit inside the city is what suits your day, the best spas in Barcelona covers those.
The spring at the Font del Lleó in Caldes de Montbui reaches 74 degrees, the highest temperature of any thermal water in the Iberian Peninsula. Every establishment there cools it in stages, so no circuit puts you anywhere near that.
What the hotel circuits cost
None of these require a room booking, which surprises most people looking at hotel websites.
Blancafort Spa Termal in La Garriga runs a 120-minute thermal circuit at 34.83 euros, on 93 860 56 00. It admits children aged 4 to 13 in the Natatorium with an adult during the Blancafort Kids window, 10:00 to 16:00.
Broquetas in Caldes de Montbui sells a 90-minute circuit with a drink at 34 euros.
Termes Victòria, also in Caldes de Montbui, publishes no price and takes bookings on 93 865 01 50. It runs two separate spaces, Espai CEL and the classic balneario.
The 7-euro municipal bath
Banys Termals El Safareig belongs to the town of Caldes de Montbui rather than to a hotel, which is why it costs what it costs. General entry is 7 euros and the reduced rate is 4.50 for under-16s, students, pensioners, unemployed people and youth card holders.
It opens Wednesday to Sunday in three blocks: 10:00 to 15:00, 16:00 to 18:00 and 19:00 to 22:00. Booking runs through safareigtermal.cat or by phone on 618 796 725, Wednesday to Sunday and public holidays from 10:30 to 14:00 and 16:30 to 21:00.
That evening block is the useful part. A thermal bath that stays open until 22:00 turns the trip into an after-dinner plan rather than a whole day committed in advance.
The 15 official balnearios of Catalonia, by province
The Associació Balnearis de Catalunya lists 15 member establishments across the four Catalan provinces, which is the quickest way to see what exists beyond the four closest towns.
| Balneario | Town | Province |
|---|---|---|
| Termes Victòria | Caldes de Montbui | Barcelona |
| Broquetas | Caldes de Montbui | Barcelona |
| Hotel Termes La Garriga | La Garriga | Barcelona |
| Blancafort Spa Termal | La Garriga | Barcelona |
| Balneari Titus | Arenys de Mar | Barcelona |
| Vichy Catalan | Caldes de Malavella | Girona |
| Balneari Prats | Caldes de Malavella | Girona |
| Font Vella | Sant Hilari de Sacalm | Girona |
| Termes Orion | Santa Coloma de Farners | Girona |
| Termes Montbrió | Montbrió del Camp | Tarragona |
| Platja de Comarruga | Coma-ruga, El Vendrell | Tarragona |
| Vallfogona de Riucorb | Vallfogona de Riucorb | Tarragona |
| Caldes de Boí | Caldes de Boí | Lleida |
| Iberik Rocallaura | Rocallaura | Lleida |
| Balneari Sant Vicenç | Els Banys de Sant Vicenç | Lleida |
Five sit in Barcelona province and are the realistic day trips. The Lleida ones are mountain destinations that pair with a weekend getaway from Barcelona rather than a single day.
Getting to each town, and the one with no station
One practical fact reshapes most plans: Caldes de Montbui has no train station. You reach it on the Sagalés e9 bus, which leaves Barcelona every 20 to 30 minutes and takes around 45.
The others are on the commuter network.
| Town | Province | How you get there |
|---|---|---|
| Caldes de Montbui | Barcelona | Sagalés e9 bus, around 45 minutes |
| La Garriga | Barcelona | Rodalies R3, the L’Hospitalet to Vic line |
| Arenys de Mar | Barcelona | Rodalies R1, the coastal line |
| Caldes de Malavella | Girona | Rodalies, the Girona line |
Which ticket makes sense for your stay is in the Barcelona public transport guide.
What costs nothing in Caldes de Montbui
The Font del Lleó spring sits in the town square and can be seen without paying anything, as can the Termes Romanes.
Thermalia, which works as both museum and tourist office, is at plaça de la Font del Lleó 20, on 938 654 140. It is the place to ask what is open on the day you turn up, which matters in a town where the baths close on Mondays and Tuesdays.
Between the square, the Roman baths and a 7-euro ticket in the afternoon, the whole day costs less than one 34-euro hotel circuit, and the 45-minute bus each way is the only other expense.
When to go, and why October to March wins
Thermal bathing is a cold-weather plan. Between October and March the contrast with the outside air is most of the experience, and it is also when the 19:00 to 22:00 block at El Safareig makes most sense, because it is dark and cold outside.
In summer the same trip competes with cold water and usually loses: the natural swimming pools and gorgs near Barcelona cost nothing and need no booking.
There is a practical argument for the shoulder months too. La Garriga and Caldes de Malavella both sit on lines that continue somewhere else, so the R3 carries on to Vic and the Girona line reaches Girona itself, which makes a half-day bath into a full day without a car. Picking the month is covered in the best time to visit Barcelona.
Frequently asked questions about thermal spas near Barcelona
What is a balneario and how is it different from a spa?
A balneario is built on a natural mineral spring and uses that water directly. A city spa heats and treats ordinary water. In Caldes de Montbui the spring reaches 74C, the hottest in the Iberian Peninsula, and establishments cool it before it reaches any pool.
Can you use a balneario without staying the night?
Yes, and it is the normal way to do it. Blancafort in La Garriga sells a 120-minute thermal circuit at 34.83 euros and Broquetas in Caldes de Montbui a 90-minute one with a drink at 34 euros. Neither requires a hotel booking.
Which thermal town can I reach by train from Barcelona?
La Garriga on Rodalies line R3 and Arenys de Mar on line R1, both inside Barcelona province, plus Caldes de Malavella on the Girona line. Caldes de Montbui, the most famous of them, has no station at all and is reached by Sagalés bus.
Is there a cheap way to try thermal water?
The municipal baths in Caldes de Montbui, Banys Termals El Safareig, charge 7 euros for general entry and 4.50 reduced. They open Wednesday to Sunday, including an evening slot from 19:00 to 22:00, and booking goes through safareigtermal.cat.
Two AEMET stations 404 metres apart disagree by 2.5 °C on December highs, and February turns out to be the second driest month of the year: the Barcelona in winter guide works through what that means for a trip.
Which day not to come
Monday and Tuesday, if the municipal bath is the plan. Banys Termals El Safareig in Caldes de Montbui opens Wednesday to Sunday, so a long weekend on those days removes the 7-euro option entirely.
Hotel spas run on a different calendar and fail differently: Blancafort in La Garriga and Broquetas in Caldes de Montbui both work by reservation, so a Saturday in season can be full even with the doors open.
Then there is the third case, the rate that exists on no website at all. Termes Victòria publishes no price and takes bookings on 93 865 01 50, which makes turning up unannounced the fastest way to lose an afternoon.
If the day goes wrong, what holds up is the street: the Font del Lleó at 74 degrees and the Roman baths in Caldes de Montbui are outdoors, free and unticketed, as the Caldes de Montbui guide explains.
Prices and opening hours were read on 21 August 2026 from each establishment’s own site and from the Ajuntament de Caldes de Montbui. The list of 15 balnearios is published by the Associació Balnearis de Catalunya.
The municipal bath costs 7 euros and stays open until 22:00.