Here are 5-star Singapore hotels that have rooftop (or elevated) pools — with notes on which offer private cabanas or similar private daybeds. I’ve cited the hotel or reliable travel sources so you can check current availability and booking rules (some properties restrict pool access to registered guests or require reservations).

• Marina Bay Sands — SkyPark Infinity Pool (Level 57). Iconic rooftop infinity pool with panoramic city views; access is for hotel guests only. (Does not advertise private cabanas on the SkyPark pages.) (marinabaysands.com)

• W Singapore – Sentosa Cove — WET® Pool. Large outdoor pool with a swim‑up bar and private cabanas/daybeds available for guests (hotel pages and travel guides list private cabanas with in‑room booking/first‑come terms). (thetourguy.com)

• Andaz Singapore (by Hyatt) — rooftop infinity pool (Level 25). Frequently mentioned as a rooftop pool with private teepees/day‑bed style areas near the rooftop bar (Mr Stork); pool access is guest‑only and some seating is reservable. (therooftopguide.com)

• Capella Singapore (Sentosa) — resort pools and villa pools. Upscale resort with cabana‑style pool seating and private villa pools for villa guests; marketed as private pool/ cabana options in resort materials and travel guides. (thetourguy.com)

• Fullerton Bay Hotel Singapore — rooftop/terrace pool with Marina Bay views. Well known for its elevated pool and intimate lounge setting; sources describe garden/alcove seating but do not emphasise large private cabanas as a regular offering. (travel195.net)

• Hilton Singapore Orchard (Hilton Orchard or Hilton Orchard Road) — elevated pool with cabanas. Travel writeups list cabanas and daybeds at the hotel’s rooftop/upper‑level pool area. (Check the hotel site for current cabana booking rules.) (momentslog.com)

• PARKROYAL COLLECTION / PARKROYAL Collection Pickering — elevated/rooftop pool and private cabana options reported by travel sources for its garden/ pool areas (an eco‑garden property with poolside private seating). (travel195.net)

Notes and booking tips

• Many hotels restrict pool access to registered guests and require advance reservations for private cabanas or daybeds — policies and fees change seasonally. If a private cabana is essential, contact the hotel directly to confirm availability, cost, and rules for non‑guests (some properties allow cabana booking only for in‑house guests). (marinabaysands.com)
• “Cabanas” can mean different things: private curtained daybeds, reserved shaded lounges, villa private pools, or teepee/daybed installations — check photos/descriptions before booking. (tripadvisor.com)

If you’d like, I can:

• Check current cabana availability and prices for specific dates (I’ll look up each hotel’s official site and callouts), or
• Narrow the list by area (Marina Bay, Sentosa, Orchard) or vibe (party atmosphere vs. quiet/romantic).