Here are high‑end luxury resorts in Sri Lanka known for exceptional wellness, spa and retreat programmes — short summaries so you can pick the right style (beach, tea‑country hills, cultural‑triangle seclusion, or nature immersion).

1. Santani Wellness Resort (Tennekumbura / near Kandy)

• Why go: Sri Lanka’s dedicated wellness retreat focused on Ayurveda, personalised wellness programmes, meditation, yoga and minimal‑ist villa design set on a former tea estate. Strong reputation for multi‑day health programmes and privacy. (Wallpaper.com)
• Best for: focused detox, Ayurvedic cures, digital‑detox and mindful design lovers.
• Location: hill country ~1 hour from Kandy.

2. Amanwella (Tangalle, south coast)

• Why go: Aman’s small, ultra‑private beach resort offering in‑suite and beach treatments, dedicated wellness menu, yoga on an open‑air platform and personalised fitness. Ideal if you want a high‑service beach spa retreat with yoga and meditation options. (Aman.com)
• Best for: luxurious beachside relaxation plus simple, high‑quality spa and movement sessions.
• Location: Tangalle (southern coast).

3. Anantara Peace Haven Tangalle Resort (Tangalle)

• Why go: Large luxury resort with an award‑winning Anantara Spa offering Ayurvedic therapies, multi‑day wellness programmes (sleep programmes, detox), yoga pavilion, and comprehensive spa facilities. Good mix of traditional Ayurveda and modern spa rituals. (Anantara.com)
• Best for: couples and travellers who want resort comforts plus authentic Ayurvedic therapies.
• Location: clifftop on southern coast (Tangalle).

4. Cape Weligama (Weligama / southern coast)

• Why go: Boutique luxury clifftop resort with a “Sanctuary Spa” that offers tea‑inspired treatments, warm herbal compresses, lava‑shell therapies and yoga; strong focus on locally inspired spa rituals (Ceylon tea, cinnamon). (resplendentceylon.com)
• Best for: wellness stays that combine cliff/sea views, bespoke spa rituals and refined dining focused on wellbeing.
• Location: Weligama, southern coast.

5. Ceylon Tea Trails (Haputale / Nuwara Eliya area)

• Why go: Relais & Châteaux tea‑estate experience with in‑room and on‑site spa treatments inspired by tea and local herbs, restorative baths and gentle wellness activities (walks, hikes). Luxurious, intimate bungalows in tea country. (legacy.resplendentceylon.com)
• Best for: quiet, restorative stays in cool hill country with tea‑based wellness touches.
• Location: tea country (central highlands).

6. Jetwing Vil Uyana (near Sigiriya / Cultural Triangle)

• Why go: Unique wetland‑and‑rice‑paddy setting offering spa treatment rooms, steam/wet areas, yoga and nature‑based wellbeing experiences. Combines wildlife/serenity with spa comforts. (jetwinghotels.com)
• Best for: nature lovers who want wellness plus proximity to Sigiriya and cultural sites.
• Location: near Sigiriya / Dambulla.

7. Uga Ulagalla (Anuradhapura / Cultural Triangle)

• Why go: Private villa resort with a secluded spa offering signature Ayurvedic and Western treatments, warm‑stone and botanical therapies, and villa privacy—good integration of wellbeing and culture. (ugaescapes.com)
• Best for: secluded villa stays with personalized spa treatments in the Cultural Triangle.
• Location: near Anuradhapura.

8. Chena Huts by Uga Escapes (near Yala)

• Why go: Eco‑luxury/bolthole near Yala National Park with private spa pavilions and wellness packages — great for combining wildlife, silence and restorative spa time. (Brand: Uga Escapes properties emphasise local therapies and private treatments.) (ugaescapes.com)
• Best for: combine safari with spa and solitude.
• Location: southern/Yala region.

Notes to help you decide

• Type of wellness: Santani and dedicated Ayurvedic centres emphasize multi‑day, medically guided programmes; Amanwella, Cape Weligama and Anantara lean more to luxury spa + wellness activities (yoga, bespoke massages); Jetwing Vil Uyana and Uga Ulagalla offer nature+wellness blends ideal for cultural/safari add‑ons. (Wallpaper.com)
• Booking tips: for Ayurvedic programmes reserve in advance (consult resident Ayurveda doctors where offered). For peak season (Dec–Mar on southern coast), book early. (Resort pages cite programme/booking info.) (Anantara.com)

If you’d like, I can:

• Build a 5‑7 day sample wellness itinerary (including transfers, ideal length for Ayurvedic cures, and suggested treatments), or
• Compare 2–3 of these resorts side‑by‑side for exact wellness programmes, price estimates for your travel dates, and travel logistics from Colombo.

Which follow‑up would you prefer?