Nascente das termas de S. Pedro do Sul

Sao Pedro do Sul, Viseu District, Portugal

Location: Sao Pedro do Sul, Viseu District, Portugal
Water type: sulfurous
Temperature: 68 °C
pH: 6.5

Water profile

Thermicity

Sedative

68 °C

LowHigh

Relaxing — deep, immediate muscle release.

Mineralisation

Bio-active

LowHigh

Rich in active gases or metals — a strong mineral character.

Buoyancy

Standard buoyancy

LowHigh

Soft water — natural, classic buoyancy.

SoufreSulfuresSulfates

Nascente das Termas de S. Pedro do Sul is the principal mineral spring source of the celebrated São Pedro do Sul thermal spa in the Viseu district of central Portugal, where naturally sulphurous hot water emerges from granite bedrock at temperatures approaching 70 degrees Celsius — among the hottest and most mineralised thermal springs in Portugal. São Pedro do Sul has a therapeutic tradition dating back to Roman times, when the baths of Aquae Lafoes attracted visitors from across Lusitania, and the spring continues to supply one of Portugal's most important and beloved thermal resorts. The nascente — the source — is the living heart of a wellness heritage that spans two millennia.

Insider tip — This spring at Sao Pedro do Sul in Portugal's Viseu district is one of the hottest natural thermal sources on the Iberian Peninsula, with waters emerging at up to 68°C and requiring cooling before bathing. The sulfurous waters have been exploited since pre-Roman times and are among the most medically renowned in Portugal, especially for rheumatic and respiratory conditions. The modern spa complex is built directly over the original Roman source channel in the Vouga river valley.

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