To Sua Trench and Lalomanu
The idyllic south coast of Upolu - home to the world-famous To Sua Ocean Trench, a stunning deep swimming hole in a lush garden, and Lalomanu, a beach of dazzling white sand and turquoise water lined with traditional fales.
Updated 5 August 2026
The south coast of Upolu, Samoa's main island, holds two of the country's most beautiful sights. The To Sua Ocean Trench is one of the most photographed places in the South Pacific, a stunning, deep swimming hole, or giant sunken pool of clear turquoise water fed by the sea, set in a lush tropical garden and reached by a long wooden ladder down into the trench. Nearby, Lalomanu is regularly rated one of the finest beaches in the world, a dazzling curve of white sand and clear turquoise water lined with the simple, open thatched beach huts, or fales, in which visitors sleep by the sea.
What's there
- The To Sua Ocean Trench - the dramatic deep turquoise swimming hole.
- Lalomanu Beach - the dazzling white sand and beach fales.
- The beach fales - the traditional thatched huts by the sea.
- The lush coast - the tropical gardens, blowholes and coves.
When to go
May to October, the drier, cooler season, for the best weather and calmest seas; the wet season from November to April is hotter with a cyclone risk. Swimming in the To Sua trench is best around low tide, when the water is calmer, and the beach fales offer a magical, simple night by the sea.
Practical notes
The famous To Sua trench is a specific, if spectacular, swimming spot reached by a steep ladder, so it suits those comfortable climbing down and swimming in deep water, and it can get busy; the beach fales are simple and open, an authentic but basic way to stay. Some south-coast areas were rebuilt after a 2009 tsunami. For the sheer beauty of the trench, the world-class beach and the traditional island stay, though, this coast is magical.
Nearby
The capital Apia, the waterfalls and the north coast are elsewhere on Upolu.
What to pack for To Sua Trench and Lalomanu
Chosen from what this place is for. Tap a kit for the full checklist.
- Reef-safe sunscreen - High SPF that will not bleach the coral you are swimming over. Find on Amazon
- Shelter suited to the place - Tent, tarp or hut booking - match it to the terrain and rules. Find on Amazon
- Quick-dry towel - A microfibre towel packs small and dries in minutes. Find on Amazon
- A warm sleeping bag + mat - Rated a little colder than you expect the nights to be. Find on Amazon
Some links on this page are Amazon affiliate links - if you buy through them we may earn a small commission at no extra cost to you.
All packing kitsPlan your trip
Where to start if To Sua Trench and Lalomanu is going on the list.
Booking links on this page are affiliate links - if you book through them we may earn a small commission at no extra cost to you. It never changes what we write about a place.
Opening times, ticket prices and seasonal closures change - check the official source before you go: official site.


