Great — here are curated luxury wellness weekend escapes in Singapore, with what makes each special, suggested 2-night itineraries, estimated price guidance, and quick booking tips.

Top picks (what makes them stand out)

• Capella Singapore — Auriga Spa: rainforest setting on Sentosa, award‑level holistic spa with multi‑hour detox & signature rituals; ideal for a nature‑immersed, slow‑paced wellness weekend. (gotraveldaily.com)
• Raffles Sentosa (new flagship) — all‑villa resort: private pool villas, on‑site large spa complex with plunge pools and specialized treatments — great for a fully private, beachside wellness weekend. (dailytelegraph.com.au)
• The Spa at Mandarin Oriental (Marina Bay): recognized in recent hotel‑spa awards as Singapore’s top hotel spa — perfect for luxury urban wellness with waterfront views. (worldspaawards.com)
• Banyan Tree Spa (Marina Bay Sands): iconic urban spa with Asian rituals, steam/thermal experiences and city panoramas — excellent for combining city sightseeing with deep therapies. (gotraveldaily.com)
• COMO Shambhala (COMO Orchard / COMO Metropolitan): urban flagship of the COMO wellness brand offering clinical and holistic treatments — suited for guests who want evidence‑based therapies and fitness/wellness programming. (vogue.com)

Suggested 2‑night weekend itineraries

1. Sentosa rainforest reset (Capella Auriga)

• Day 1 (Fri evening): Arrive, check in to villa/room overlooking the Knolls; light dinner at hotel.
• Day 2 (Sat): Morning guided yoga or walk in the resort grounds; 90–180‑minute Auriga signature treatment (detox or moon ritual); nourishing lunch; afternoon pool or steam/ice contrast session; sunset walk on Sentosa beach; mindful dinner.
• Day 3 (Sun): Gentle sunrise Tai Chi or meditation, short spa facial, late checkout and brunch before departure.
• Why this works: long spa journeys (3–4 hrs available), forest ambience, focused detox options. Estimated weekend cost: SGD 700–2,500+ per night depending on room type and spa package (Auriga packages add several hundred SGD). (gotraveldaily.com)

2. Private‑villa beach escape (Raffles Sentosa)

• Day 1: Private villa arrival with butler service; enjoy villa pool and in‑villa spa treatment.
• Day 2: Full spa day — couple’s suite or multi‑treatment journey; optional fitness class or beach time; bespoke dining.
• Day 3: Leisurely breakfast, short morning spa express treatment, depart.
• Why this works: villa privacy, dedicated wellness facilities (plunge pools, steam rooms) and tailor‑made programs. Expect premium pricing for villas and spa journeys. (dailytelegraph.com.au)

3. Marina Bay urban wellness (Mandarin Oriental + Banyan Tree)

• Day 1: Check in with Marina Bay skyline views; evening thermal circuit or rooftop pool time.
• Day 2: Morning guided meditation or in‑room private trainer; long signature treatment at Mandarin Oriental or Banyan Tree (steam/thermal + massage); post‑treatment light lunch and slow afternoon at infinity pool; optional cultural visit (Gardens by the Bay) at sunset.
• Day 3: Sunrise stretch, express facial or massage before checkout.
• Why this works: combines best‑in‑city spa awards with easy access to cultural highlights and fine dining. Spa packages and rooms vary — mid to high range pricing. (worldspaawards.com)

4. Orchard/urban specialist (COMO Shambhala / COMO Orchard)

• Day 1: Arrive in Orchard, easy check in; light movement class (Pilates/yoga).
• Day 2: COMO Shambhala signature therapy (may include Hyperbaric Oxygen or targeted therapeutic programs), health consultation, mindful meal and wellness coaching.
• Day 3: Short workout or stretch, brunch and depart.
• Why this works: focused on therapeutic, evidence‑based treatments and wellbeing coaching within the city. (vogue.com)

Booking tips and practical notes

• Book spa treatments in advance (especially weekend slots) — premium spas often fill early. Most top spas allow online reservations or require direct contact. (gotraveldaily.com)
• Look for “wellness” / “detox” / “couples” packages — these bundle multiple treatments, meals and often late checkout to make the most of a weekend. (solutions.mydayaway.com)
• Transport: Sentosa hotels are a short taxi drive from the city (20–30 minutes typical, depending on traffic); Marina Bay hotels are centrally located for sightseeing. (Check local travel times for your dates.)
• Currency and tipping: Singapore uses SGD; service charges are common at luxury hotels, but extra tipping is discretionary.
• Timing: If you plan a weekend break, arriving Friday evening and departing Sunday late afternoon or Monday morning (if you can) gives the most time for long spa journeys.

If you’d like, I can:

• Compare 3‑4 specific packages (dates you’d travel) and find current rates/availability; or
• Build a fully timed itinerary (including transfers, dining reservations and activities) for one chosen property.

Which option interests you most (Capella, Raffles Sentosa, Marina Bay hotels, COMO Shambhala), and what weekend dates are you considering?