Great — here are well-known Sri Lankan hotels and resorts that offer rooms or villas with private pools (organized by area). I’ve included a short note about the private-pool offering and a source you can check for photos/availability.

South coast / Tangalle & nearby

• Amanwella (Tangalle) — all suites feature private plunge pools and terraces; classic Aman minimal design perched above a crescent beach. (bluelankatours.com)

• Anantara Tangalle (Anantara Peace Haven) — a range of private-pool villas (beach pool villas, ocean-view pool villas, garden pool villas) with private plunge pools and outdoor dining. (destination2.co.uk)

Weligama / Mirissa (south-central coast)

• Cape Weligama (Weligama) — villas and select pool pavilions include private or semi-private 15 m infinity pools (Pool Pavilion and Ocean Pool Villa categories have private pools). (visitweligama.com)

Yala / southeast (wildlife + beach)

• Chena Huts by Uga Escapes (Yala) — luxury cabins (huts) each with a private plunge pool and deck, bordering Yala National Park. Great option if you want private pool plus safari access. (ugaescapes.com)

Bentota / southwest (beaches & resorts)

• Jetwing Saman Villas (Bentota) — several suite/villa categories include private pools (Saman Villa Suite / Deluxe Suite with pool / Grand Deluxe Suite with Pool options). Adults-only option is available. (TripAdvisor.com)

Other options and smaller villas

• Luxury boutique villas and private beach houses up and down the coast frequently offer private pools (e.g., independent villas near Mirissa, Tangalle and Bentota). Search villa rentals by “private pool Sri Lanka” or look on resort sites/booking platforms for “private pool” as a room filter. (Examples above show both branded resorts and villa-type offerings.) (resplendentceylon.com)

Quick tips

• “Private pool” can mean fully private for your room, a plunge pool in a walled courtyard, or a villa pool shared between 2–3 villas — check the specific room description (Pool Pavilion / Ocean Pool Villa vs. “shared semi-private pool”). Cape Weligama, for example, has both fully private pool pavilions and villas that share a pool between 2–3 units. (hotel-boutique.it)
• Availability and exact room categories (and whether a pool is private or semi-private) change frequently — confirm the pool type with the hotel (or your agent) before booking.
• If you’d like, I can: (a) shortlist options in a particular area (e.g., Tangalle vs. Galle vs. Yala), (b) check rates/availability for specific dates, or (c.1) compare privacy level and pool size for 2–3 properties you’re considering. Which would you prefer?