Portugal's hot springs are termas, and at least 28 of them sit in this directory across the mainland and the Azores. The iron-rich Terra Nostra Thermal Pool in Furnas turns bathers orange, while Termas de Sao Pedro do Sul has run as a mainland spa since Roman times. 2 of the 28 listed here are free to enter. Most are developed spa complexes.
The Azores island of Sao Miguel holds Portugal's most striking volcanic pools, fed by the Furnas caldera. Bathers soak in the botanical-garden waters of Terra Nostra Thermal Pool and the valley pools of Poca da Dona Beija, or in the free ocean spring at Ponta da Ferraria where hot water meets the Atlantic. Several of the directory's Portuguese springs lie on these islands.
Northern Portugal gathers classic termas towns through the Minho and Tras-os-Montes. Termas de Chaves pairs Roman-era baths with very hot spring water near the Spanish border, while Termas do Geres and Termas de Pedras Salgadas anchor old spa parks. Many of the listed Portuguese springs sit across the north.
Central Portugal, the Beiras, is the mainland's thermal heartland of spa resorts. Termas de Sao Pedro do Sul near Viseu counts among the country's oldest recorded spas, while Termas de Luso and Termas da Curia draw visitors to historic water towns. Many of the springs listed here cluster through this central belt.
The Lisbon region and the Algarve round out the map. Termas das Caldas da Rainha preserves a royal spa founded in the fifteenth century, while Termas de Monchique sits in the hills above the Algarve coast. A handful of the springs listed here lie in the centre and south.
Portuguese bathing runs through a long termas tradition, where mineral aguas termais feed spa hospitals and resort hotels rather than open wild pools. The Azores break that pattern with volcanic springs set in gardens and along the coast, though just two of them are free. Of the 28 springs listed in this directory, 2 are free and 26 are paid termas. Water at Termas de Chaves rises near 73 degrees Celsius. These sit within the wider hot springs in Europe.
