source thermale Possotome
Possotome, Mono Department, Benin
- Location
- Possotome, Mono Department, Benin
- Water type
- bicarbonate, carbonated
- Temperature
- 40 °C
- pH
- 6.3
Water profile
Thermicity
Sedative
LowHigh
Relaxing — deep, immediate muscle release.
Mineralisation
Restorative
LowHigh
Loaded with major ions — the essential minerals (Ca, Mg).
Buoyancy
High buoyancy
LowHigh
Mineralised water — eases movement and joints.
CO2BicarbonatesMagnésium
The Possotomé hot spring, in Benin's Mono Department, flows at 40°C, rich in bicarbonates and carbonated. Wild bathing in an open-air pool near Lake Ahémé.
Insider tip — The thermal spring of Possotome on the shores of Lake Aheme in coastal Benin is one of West Africa's rare geothermal curiosities, emerging through the sedimentary basin of the Gulf of Guinea margin. The water bubbles with natural carbonation alongside mineral bicarbonates, fed by deep circulation in the sedimentary aquifer heated by geothermal gradients rather than volcanism. The lake setting amid palm groves and stilt-house fishing villages of the Fon people gives this spring strong cultural and scenic appeal. Local ceremonies and rituals connected to the spring are still practiced, adding a spiritual dimension rarely found at thermal destinations.
Frequently asked questions
How hot is the water?
The water runs quite hot here, around 40 °C — a sedative water that brings immediate muscle release.
What type of water is found here?
This spot features bicarbonate & carbonated water.
What is the best season to visit?
The most favourable period for this spot is: Saison sèche.