Great choice — Tangalle is perfect for a quiet, beachside honeymoon. Below are top picks (luxury → boutique → good-value), with the highlights that make each one great for couples and a source for more details.

• Amanwella — ultra‑luxury intimate beach hideaway with only ~30 suites, each with its own private plunge pool, large infinity pool and hillside/coconut‑grove setting ideal for privacy and romantic beach dinners. Good for couples who want minimalist luxury and in‑room spa treatment options. (aman.com)

• Anantara Peace Haven Tangalle — large 5★ resort on a rocky outcrop with secluded Goyambokka beach, multiple restaurants (including cliffside dining), an award‑winning Ayurvedic spa and private pool villas with villa host service. Great if you want resort facilities plus private villa options. (About a 3‑hour drive from Colombo). (anantara.com)

• Kayaam House — a small, design‑led boutique wellness retreat in Tangalle with an infinity pool, focused spa/ayurveda program and calm, Bawa‑inspired architecture; excellent for couples who want privacy, yoga and spa packages. (legacy.thereverie.life)

• Coco Tangalla — a stylish boutique “beach house” with just a handful of rooms, ocean‑facing infinity pool and intimate service; well suited to couples who prefer a private‑house feel (can also be booked exclusively). (discerningcollection.com)

• Cape Weligama (Weligama, ~50–60 min from Tangalle) — Relais & Châteaux cliff‑top property with spectacular crescent infinity pool, private villas and multiple fine‑dining options; an excellent nearby alternative if you want dramatic clifftop views and villa privacy. (resplendentceylon.com)

• Mangrove Beach Cabanas & Chalets — beachfront mid‑range option with rustic‑chic cabanas, beach barbecues and direct beach access; great value for couples who want informal beach time and local seafood right on the sand. (beachcabana.lk)

• Ananya / Ananthaya Beach Resort (Rekawa area) — lagoon/beachfront small resort near the Rekawa turtle area, with sea/lagoon rooms and easy access to turtle‑watching and local nature excursions — perfect for couples who want wildlife + beach. (ananyabeachresort.com)

• Rekawa Lagoon Resort — local lagoon resort option for couples seeking a quieter, nature‑focused stay on the Rekawa lagoon with boat trips, birding and access to nearby turtle beaches. (rekawalagoonresort.com)

Quick practical notes

• Best season for Sri Lanka’s south coast (Tangalle) is generally December–April (driest, best swimming and whale/dolphin season). (cntraveler.com)
• Turtle‑watching at nearby Rekawa is active in the nesting months (commonly April–September) — if you want to see nesting or hatchlings, check timing with local operators before booking. (atan.lk)
• Travel time: Tangalle/Anantara area is roughly a 3‑hour drive from Colombo/Bandaranaike Intl. (via the Southern Expressway depending on traffic). (anantara.com)

How to pick the right place

• Want absolute privacy and a private plunge pool? Choose Amanwella, Cape Weligama (villas) or Anantara villas.
• Prefer a small boutique/wellness vibe? Look at Kayaam House or Coco Tangalla.
• On a mid‑range budget but still want beach access and local character? Mangrove Beach Cabanas, Ananya or Rekawa Lagoon fit well.

If you’d like, I can:

• Compare 2–3 of these options side‑by‑side (rooms, approximate nightly ranges, couples packages), or
• Check current rates/availability for your exact dates and suggest the best pick. Which would you prefer?