Visiting To Sua Ocean Trench, South Coast, Upolu

To Sua Ocean Trench is one of South Coast, Upolu's most-visited ocean trenches. This guide pairs the place with the stays nearby and the tours that include it on their itinerary, so you can plan a trip without bouncing between five tabs.

About this guide

A 30-metre-deep collapsed lava tube on Upolu's south coast, fed by an underwater channel that lets the open Pacific flow in and out with the tide. A long wooden ladder spirals down to a small floating dock — the climb makes the swim feel earned. Surrounded by manicured native gardens with showers, picnic fales and a small mini-mart selling cold drinks. Skilled divers can swim through the cave passage to the open sea.

Where to stay (8)

Things to do (7)

Practical info

Before you fly, skim our Samoa travel info page — visa rules, ferry to Savai'i, driving on the left, village fees, and cultural protocols. For event timing, the Samoa events calendar covers festivals, public holidays, and weekly markets.