The Retreat Onsen & Spa
Situated within the Ashton building along the Asok-Din Daeng corridor in Bangkok's Din Daeng district, The Retreat Onsen & Spa offers a Japanese-inspired bathing and wellness experience in the heart of the city. The combination of onsen facilities and spa treatments sets it apart from conventional urban day spas, providing guests with a more immersive approach to relaxation that draws on traditional hot spring bathing culture alongside bodywork and therapeutic services.
Visitors can expect a calm, restorative atmosphere designed to encourage unwinding from Bangkok's fast pace. The onsen element — mineral-infused soaking pools central to the Japanese wellness tradition — is the defining feature here, complementing whatever spa treatments are on offer. The location within a modern residential and mixed-use building gives the facility a boutique, relatively private feel rather than the high-volume atmosphere of a hotel spa chain.
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Experience hints
Pair your visit. After The Retreat Onsen & Spa, round out your day in Bangkok with contrasting stops nearby.
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Go at six in the morning, before the heat turns 15,000 stalls into an endurance test.
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Go at 08:30 or don't bother, the Emerald Buddha's courtyards fill up fast and stay full until closing.
The Grand Palace
Go at 08:30 sharp, cover your shoulders and legs, and give it three hours rather than one.
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Vast, air-conditioned and genuinely easy to navigate, with a top-floor food scene worth the trip alone.
The Retreat Onsen & Spa: Frequently Asked Questions
Is The Retreat Onsen & Spa worth visiting?
The Retreat Onsen & Spa holds a 4.7★ rating from 21 Google reviews, placing it among the highest-rated wellness & spas in Bangkok.
When is the best time to visit The Retreat Onsen & Spa?
The best months to visit Bangkok are November – February, with the most reliable weather. Crowds peak in December & January — going early in the day usually means fewer people. Months to think twice about: April – May (peak heat).
Where is The Retreat Onsen & Spa located?
The Retreat Onsen & Spa is at 469/2, 469/4, อาคาร Ashton, Thanon Asok - Din Daeng, Khwaeng Din Daeng, เขตเ, Krung Thep Maha Nakhon 10400, Thailand, in Bangkok. Getting around Bangkok: BTS Skytrain (most central areas); MRT Metro (underground).
Location Info
469/2, 469/4, อาคาร Ashton, Thanon Asok - Din Daeng, Khwaeng Din Daeng, เขตเ, Krung Thep Maha Nakhon 10400, Thailand088 990 6666www.theretreatspa.com/Visitor Information
Best time to visit
November – February
Avoid: April – May (peak heat)
Rainy season
May – October
Avg. temperature
25°C – 34°C(77°F – 93°F)
Crowds
Peak: December & January
Getting there
Suvarnabhumi (BKK) and Don Mueang (DMK) airports serve Bangkok with direct flights from most major cities.
Getting around
- •BTS Skytrain (most central areas)
- •MRT Metro (underground)
- •Airport Rail Link (ARL)
- •Chao Phraya Express Boat
- •Grab (ride-hailing app)
- •Metered taxis — always use the meter
Where to stay near The Retreat Onsen & Spa
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Tips for Visiting Wellness & Spas
Learn Wat Pho First
Wat Pho in Bangkok is the birthplace of traditional Thai massage education. Their on-site massage pavilion offers excellent treatments from students and graduates at reasonable prices — and you know the technique is authentic.
Communicate Pressure Preferences
Thai massage can be intense. Say 'bao bao' for lighter pressure or 'nак nак' for harder. A good therapist will check in, but don't hesitate to speak up — suffering in silence defeats the purpose.
Book Longer Sessions
A 60-minute massage is fine, but 90 or 120 minutes allows the therapist to work thoroughly. The price difference is often only 200–400 THB for an extra hour — worth it for a deeper, more relaxing experience.
Nearby Places
Sense Serene Retreat Spa - Avani Ratchada Bangkok Hotel
A hotel spa on Ratchadaphisek Road offering aromatherapy and Thai massage in a calm, upscale setting.
Health Land Spa & Massage (Asoke)
Book a day ahead, take the two-hour Thai massage, and let it anchor your Sukhumvit evening.
Oasis Spa Bangkok (Sukhumvit 31)
Down a leafy residential soi off Sukhumvit 31, Oasis Spa is the day-spa experience without the hotel-spa bill: garden villas around greenery, treatment rooms built for couples, and a menu of multi-hour packages that treat massage as an occasion rather than an errand.
Bangkok Shambhala Meditation Center
A welcoming urban meditation center in Sukhumvit offering drop-in sessions and beginner courses year-round.
Similar Wellness & Spas Across Thailand
Royal Palm Spa
Ao Nang's late-opening massage spot, where regulars book therapists by name and rarely get it wrong.
Sansabai Massage 2
Serious, results-driven massage in central Phuket Town, with therapists who actually read your body.
Centara Ao Nang Beach Resort & Spa Krabi
Beachfront calm at the quiet end of Ao Nang, with the bars and shops still an easy walk away.
The One Massage - Pattaya
A proper, professional massage on Walking Street, open from mid-afternoon until half past midnight.
Where to stay near The Retreat Onsen & Spa
Find hotels in Bangkok on the booking sites travellers trust most.
- Compare prices across sites
- Filter for free cancellation
- Secure checkout on the partner site
Compare rates on Booking.com
Largest selection
Compare rates on Expedia
Bundle & save
Compare rates on Hotels.com
Member prices
We may earn a commission from bookings made through these links — at no extra cost to you. Learn more.
Location Info
Visitor Information
Best time to visit
November – February
Avoid: April – May (peak heat)
Rainy season
May – October
Avg. temperature
25°C – 34°C(77°F – 93°F)
Crowds
Peak: December & January
Getting there
Suvarnabhumi (BKK) and Don Mueang (DMK) airports serve Bangkok with direct flights from most major cities.
Getting around
- •BTS Skytrain (most central areas)
- •MRT Metro (underground)
- •Airport Rail Link (ARL)
- •Chao Phraya Express Boat
- •Grab (ride-hailing app)
- •Metered taxis — always use the meter