Siam Hot Spa

Siam Hot Spa sits across the road from Ranong’s free public hot springs park, piping the same mineral-rich geothermal water into a private commercial spa with soaking pools, individual bathing rooms, a sauna, and a Thai massage menu. Pool and sauna access starts at roughly 200 THB, with massage and other treatments booked and paid separately — this is not the free municipal park, and treating it as such is the most common mix-up among visitors researching Ranong’s hot springs.

The layout centres on a main jacuzzi pool with smaller private rooms around it, each with its own bath or jacuzzi for couples or anyone who’d rather skip the shared pool. A steam room and sauna round out the facilities. Massage treatments run in open-air pavilions off the main pool area — Thai massage, aroma-oil body work, and foot reflexology are the standard menu, each booked on top of the base pool entry.

Watch out: Don’t confuse this with Raksawarin Hot Springs and Public Park across the street, which is free and shows the actual boiling spring source in a public garden setting. Siam Hot Spa is the paid, private soaking-and-massage version of the same water.

The mineral water itself is what draws people to Ranong in the first place — locals have used the springs for generations, and the sulfur content is mild enough that most visitors find it more pleasant than sharp-smelling. Reviews are mixed on polish (some rooms show their age), but consistent on the water and the massage quality being worth the modest price.

Insider Tip: Go in the morning if you want the pools to yourself — by early afternoon, day-trippers stopping between Ranong town and the pier tend to fill the shared jacuzzi.

Bring a towel and a change of clothes; basic swimwear is required in the shared pool area, though private rooms don’t require it. Pack water, since extended soaking in warm mineral water is dehydrating. The spa is a short drive or tuk-tuk ride from central Ranong, with easier access if you have your own transport.

For the free alternative to see the actual spring source, visit Raksawarin Hot Springs and Public Park just across the road, or explore more of Ranong province’s hot spring trail.