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To Sua Ocean Trench

Lotofaga, Upolu, Samoa
To Sua Ocean Trench
Location
Lotofaga, Upolu, Samoa
Water type
sodium chloride
Temperature
28 °C
pH
7.8

Water profile

Thermicity
Invigorating
28 °C
LowHigh

Stimulating — wakes the body and boosts circulation.

Mineralisation
Restorative
LowHigh

Loaded with major ions — the essential minerals (Ca, Mg).

Buoyancy
Effortless float
LowHigh

Dense, salty water — you float without effort.

eau de merChlorure de sodiumMagnésiumCalciumsilice volcanique

To Sua Ocean Trench on Upolu island in Samoa is one of the most photographed natural swimming experiences in the Pacific — a vast circular pit some 20 metres across plunging through volcanic rock to a turquoise pool connected by an underground tunnel to the open sea, where the tide flows in and out bringing fresh ocean water through the sea caves. The chloride-rich seawater in the trench, warmed by the tropical sun and surrounded by the lush tropical garden landscape of Samoa, creates a bathing experience of extraordinary natural beauty and geological drama. To Sua — meaning Large Hole in Samoan — is reached by ladder descending from the clifftop garden into the rock-walled pool below, with ocean waves and sea light filtering in through the underwater cave connection. The surrounding landscape of Samoa's southern coast, with its dramatic sea cliffs, blowholes and traditional Samoan fale architecture, provides a setting of genuine Pacific island beauty.

Insider tip — Arrive at opening (8 a.m.) for the best light and the pool empty of bathers.
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Frequently asked questions

How hot is the water?
The water is on the cooler side here, around 28 °C — an invigorating water that boosts circulation.
What type of water is found here?
This spot features sodium chloride water.
What is the best season to visit?
The most favourable period for this spot is: Mai|Juin|Juillet|Août|Septembre|Octobre.