Grutas Tolantongo TourWhat Is the Water Temperature at Grutas de Tolantongo?
Pool temperature
The terraced soaking pools are heated by geothermal springs and stay between 36–38°C year-round. That is just above normal human body temperature (37°C) and feels very warm and comfortable. The water does not cool in winter or heat in summer; it is constant.
River temperature
The thermal river flowing through the canyon is about 30°C (86°F), also comfortably warm but cooler than the pools. It is swimmable and pleasant, and the rocky bottom provides natural massage if you sit under small cascades.
What changes by season
The water temperature is constant year-round. What changes is air temperature. In November, cool mornings (10–15°C) and warm water create the best contrast. In summer, warm air and warm water feel less striking. But if you like hot springs, the thermal experience is identical in January and July.
Book a Tolantongo tour
The simplest way to visit Grutas de Tolantongo is a guided tour — a live guide, breakfast and logistics handled, and the canyon in full daylight, with free cancellation.
Frequently asked questions
Is the water hot or warm?
Warm. The pools are 36–38°C (97–100°F), just above body temperature. The river is about 30°C (86°F). Both are comfortable for long soaks.
Is the water warmer in summer?
No, it is the same year-round. Geothermal water stays at a constant temperature. Air temperature is what changes by season.
Can you stay in the water a long time?
Yes. The warm temperature makes long soaks comfortable. Reviewers report spending hours in and out of the pools without getting cold.