Sea caves of Tonga · about 11 km from Neiafu (Vava'u)
Mariner's Cave (Nuapapu)
- Max depth16.5 m
- CertificationOpen water / no overhead
Diving and fills
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The dive
You swim in from below and surface in an airtight chamber in the rock. Each time the surge pulls back, the pressure and temperature drop and an eerie fog drifts through the chamber.
Profile and sections
You swim in from below and surface in an airtight chamber in the rock. Each time the surge pulls back, the pressure and temperature drop and an eerie fog drifts through the chamber.
The cave is part of Vava'u's folklore.
Practical: free for yachties with their own boat; others join a boat trip from Fangafoa Marina in Neiafu.
- Depth and profile
- Divers use the lower entrance at 16.5 m; snorkellers swim ~4 m underwater to get in. Inside, an enclosed air chamber.
- Configuration
- A short passage to an air chamber: recreational gear with a torch (estimate).
Who can dive where
- At least Open water / no overhead
- Configurations: Backmount / twinset / Sidemount / CCR / Small cylinders / no-mount (speleo sumps)
- Goes down to 16.5 m (trimix or deco may be needed)
This is how the planner decides who in your team may dive this cave. Rules your own trip adds (organizer, a mail, the AI) show with your trip.
How to get there
On the northwest coast of Nuapapu, by boat from Neiafu with a local dive operator. Closed on Sundays.
Around Mariner's Cave (Nuapapu)
FillsNo fill station known nearby
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Other sites2 within 3 km
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