Nice brief list — here are top luxury hotels in Singapore that offer private in‑room or in‑villa pools (or suites with private plunge pools), with a quick note on what makes each special:

• Raffles Sentosa — all‑villa resort where every villa includes its own private outdoor pool and terrace; ultra‑private, full butler service and multiple villa sizes (1–4+ bedrooms). (raffles.com)

• Capella Singapore (Sentosa) — one‑ and two‑bedroom villas with outdoor plunge pools; excellent for couples and families who want resort privacy close to the city. (capellahotels.com)

• W Singapore – Sentosa Cove — Extreme WOW Suite (and selected premium suites) feature an outdoor terrace with a private plunge pool; great if you want contemporary design and a lively hotel atmosphere. (marriott.com)

• Sofitel Singapore Sentosa Resort & Spa — Villa du Jardin (private villa category) with a private swimming pool and large terrace; a leafy, romantic option on Sentosa. (sofitel-singapore-sentosa.com)

• Resorts World Sentosa – Equarius / Beach Villas — multi‑bedroom villas (Equarius/Beach Villas) with private pools or private pool terraces — ideal for families or groups visiting the island attractions. (rwsentosa.com)

• Amara Sanctuary Resort Sentosa — one‑ and two‑bedroom pool villas with private plunge pools and garden privacy; a restored‑heritage, quieter Sentosa option. (sentosa.amarahotels.com)

• The Barracks Hotel Sentosa — heritage suites with direct/semi‑private pool or jacuzzi access from certain suite types (boutique, very private). Good if you prefer a smaller, design‑led property. (thebarrackshotel.com.sg)

Booking tips

• Confirm the exact room/villa category before booking (“pool villa”, “private plunge pool”, “suite with plunge pool”) — hotel websites/photos/spec pages are the definitive source. (raffles.com)
• Ask about pool dimensions/privacy, fence/cover rules, and any minimum‑stay requirements for villa categories (some offers require 2+ nights). (raffles.com)

If you want, I can:

• Narrow this to the best option by purpose (romance, family, event), or
• Check availability/rates for specific dates (I’ll need your travel dates).