Nam Phu Jet Si
San Sai, Chiang Mai, China
- Location
- San Sai, Chiang Mai, China
- Water type
- iron-rich
- Temperature
- 38 °C
- pH
- 6.3
Water profile
Thermicity
Neutral
LowHigh
Soothing — neither hot nor cold, perfect balance.
Mineralisation
Bio-active
LowHigh
Rich in active gases or metals — a strong mineral character.
Buoyancy
Standard buoyancy
LowHigh
Soft water — natural, classic buoyancy.
FerBicarbonatesManganèse
Nam Phu Jet Si is an iron-rich hot spring located in San Sai, in the Chiang Mai region. The water reaches around 38°C. The site offers open-air, wild bathing in a natural setting.
Insider tip — This iron-rich spring west of Chiang Mai sits along the Mae Ping fault zone, where mineral-laden groundwater rises through iron-bearing sediments. The reddish-orange deposits around the vents are characteristic of high ferrous content, and the water leaves a faint metallic taste. The modest temperature makes it suitable for long soaks without overheating. Surrounded by rice paddies and rural northern Thai villages, the atmosphere is authentic and crowd-free.
Nearby
Frequently asked questions
How hot is the water?
The water is neutral here, around 38 °C — a perfect balance, neither too hot nor too cold.
What type of water is found here?
This spot features iron-rich water.
What is the best season to visit?
The most favourable period for this spot is: Saison sèche.