Portugal has a long tradition of thermal bathing that goes well beyond spa weekends and fluffy robes. The country’s termas are often rooted in Roman use, later developed into medical-thermal towns where mineral waters are prescribed for specific conditions. Alongside these historic bath complexes, you’ll also find contemporary spa hotels that reinterpret the tradition in a more design-led way.
Here are six of the most worthwhile hot springs and thermal spas across the mainland and the islands.
- Termas de Vidago: luxury thermal spa in northern Portugal
- Termas do Luso: historic thermal baths in central Portugal
- Termas do Gêres: thermal spa in Peneda-Gerês National Park
- Termas de Unhais da Serra - mountain spa in Serra da Estrela
- Termas das Caldas de Monchique: thermal spa in the Algarve
- Furnas hot springs: volcanic thermal pools in the Azores
Termas de Vidago: luxury thermal spa in northern Portugal
Located in Trás‑os‑Montes, Termas de Vidago forms part of the Vidago Palace Estate, a Belle Époque hotel that first opened in 1910. The thermal waters here have been used since Roman times and gained particular popularity in the late 19th century.
The modern spa building was designed by Álvaro Siza Vieira and includes an indoor and outdoor thermal circuit, treatment rooms and relaxation areas. The waters are traditionally associated with digestive and metabolic disorders, reflecting the medical-thermal heritage of the site.
Access to the thermal spa is possible without staying overnight, but advance booking is usually required at weekends and during holiday periods.
Termas do Luso: historic thermal baths in central Portugal
Luso, in the municipality of Mealhada, is one of Portugal’s traditional termas towns, with documented thermal use dating back to at least the 18th century. It sits just below the Mata Nacional do Buçaco, a historic forest originally managed by Carmelite monks and later redesigned in the 19th century. The town’s mineral water is bottled and sold across Portugal, reinforcing its long-standing reputation.
The official thermal facility, Termas do Luso, operates as a regulated medical‑thermal centre rather than a typical hotel spa. Treatments focus on respiratory, musculoskeletal and metabolic conditions, following Portugal’s clinical termalismo tradition.
The nearby Grande Hotel do Luso is a separate historic hotel, and it houses the Malo Clinic Spa Luso, which provides rehabilitation and wellness services.
Termas do Gêres: thermal spa in Peneda-Gerês National Park
In northern Portugal’s only national park, the spa town of Gerês has welcomed bathers since Roman times. The Aguas do Geres modern thermal complex continues that tradition in a contemporary setting.
The mineral waters here emerge at high temperatures and are commonly associated with rheumatic, respiratory and skin conditions. The current spa building provides aromatherapy whirlpool baths, Vichy showers and other structured treatments rather than rustic outdoor pools.
Outside the complex, the wider Peneda‑Gerês National Park offers hiking trails, waterfalls and mountain scenery.
Termas de Unhais da Serra - mountain spa in Serra da Estrela
Situated in Serra da Estrela Natural Park, this thermal complex is integrated into the H2otel Congress & Medical Spa. The site combines a contemporary mountain hotel with an extensive wellness and spa area.
The Aquadome is said to be the first mountain spa in Portugal. It includes indoor and outdoor pools, hydrotherapy areas and treatment rooms, alongside medical and physiotherapy services.
- Find your holiday rental in the Serra da Estrela National Park
- Find property for sale in Unhais da Serra
Termas das Caldas de Monchique: thermal spa in the Algarve
Hidden in the hills above the Algarve coast, Caldas de Monchique has functioned as a thermal village since Roman occupation. The setting is more rural and understated than the Algarve’s beach resorts.
The alkaline waters are used in treatments linked to respiratory and digestive conditions within Portugal’s thermal tradition. The complex today operates as the Villa Termal das Caldas de Monchique Spa Resort.
Accommodation, spa facilities and treatment areas are grouped within a small historic cluster of buildings rather than a large-scale resort. This is the only recognised thermal spa facility in the Algarve region.
Furnas hot springs: volcanic thermal pools in the Azores
On São Miguel island, Furnas sits within a volcanic crater where geothermal activity remains visible through fumaroles and bubbling springs. Thermal bathing here is deeply woven into local life.
The waters in Furnas are iron-rich and vary in temperature depending on the spring. Bathing takes place in managed sites such as Terra Nostra Park and the Poça da Dona Beija pools, rather than in completely wild springs. The tropical-style vegetation around the pools gives the area a distinct character compared to mainland spa towns.
Stay inspired for your travels in Portugal —get our weekly newsletter for the latest travel, legal, and lifestyle news.
