Here are top luxury boutique resorts across Sri Lanka (by region), each with a short note on why it’s special and who it’s best for. I’ve included reputable recent sources so you can follow up on availability and current rates.

South coast / beach and cliff

• Cape Weligama (Weligama) — Cliff-top collection of private villas and suites with dramatic ocean views, modern design and excellent private-dining options. Best for couples and villa-style privacy. (bespoketraveldesign.com)
• The Fortress Resort & Spa (Koggala / Galle coast) — Stylish beachfront boutique resort with contemporary interiors, good spa/ayurveda programs and easy access to Galle Fort. Best for beach stays with easy cultural excursions. (en.wikipedia.org)
• Saman Villas (Bentota) — One of Sri Lanka’s original boutique hotels: intimate, villa-style suites (some with private plunge pools) on a quiet stretch of coast. Best for classic, serviced-boutique beach escapes. (en.wikipedia.org)

Central Highlands / tea-country

• Ceylon Tea Trails (Hatton / Nuwara Eliya region) — Restored colonial tea-planter bungalows (Relais & Châteaux), full butler service, tea-plantation experiences and total immersion in the highlands. Ideal for honeymooners, foodies and anyone wanting a slow, luxurious tea-country stay. (resplendentceylon.com)
• 98 Acres Resort & Spa (Ella) — Eco-luxury wooden chalets tucked into a working tea estate with excellent views and hiking access. Best for couples who want boutique + nature + spectacular sunrise viewpoints. (alike.io)

Cultural hill country & Kandy

• The Kandy House (near Kandy) — Intimate nine-room manor-house boutique with heritage charm, lush gardens and discreet service; excellent base for visiting Kandy’s cultural sites. Best for calm, historic atmosphere. (thetimes.co.uk)

Cultural/eco / inland

• Jetwing Vil Uyana (Sigiriya / Cultural Triangle) — Eco-luxury resort built into paddy/wetland habitat with wildlife, private-style pavilions and strong sustainability credentials. Excellent for nature lovers who want comfort plus proximity to Sigiriya/Polonnaruwa. (en.wikipedia.org)
• Diyabubula (Dambulla / Matale) — Small artist-designed hideaway (a handful of villas) set in a sculptural water-garden and jungle — a very boutique, art-forward retreat. Best for creative travellers seeking seclusion. (en.wikipedia.org)

How to pick

• If you want cliff/sea views and private-villa luxury: Cape Weligama or Saman Villas.
• For an intimate colonial / heritage experience: Ceylon Tea Trails or The Kandy House.
• For wildlife/eco plus easy access to the Cultural Triangle: Jetwing Vil Uyana.
• For a small, highly personal artist hideaway: Diyabubula.
• For convenient beach + spa + Galle visits: The Fortress Resort & Spa.

Practical tips

• Sri Lanka’s weather has different monsoon windows by coast (south/west Nov–Apr, east May–Oct). Plan regionally to match the season. (thetimes.co.uk)
• Many of these properties are small and fill up quickly in high season (Dec–Mar), so book early and check direct rates/transfer options.
• If you want, I can filter by your travel dates, preferred region (beach/tea-country/Cultural Triangle), or budget and give room-type recommendations and approximate nightly rates.