Mariners Cave Tonga
Vava'u, Tonga · Tonga
A fully submerged entry tunnel opens after 8 metres of horizontal swimming into an air chamber large enough to surface inside. Pressure changes from swell create a dramatic mist that fills and clears the cave with each wave cycle. The experience is genuinely unlike any other cave dive in the Pacific and requires a calm, confident buddy pair.
Conditions
Depth
3 to 12 m
Good for beginners
Current
Usually gentle
Can pick up on the edge
Visibility
20 to 30 m
Clearest in the calm season
Water
22 to 29°C
3mm wetsuit
Your chances of seeing each animal
Spinner dolphinLeast concern
Sometimes
About 1 in 3 dives
Sea snakeLeast concern
Sometimes
About 1 in 3 dives
Humpback whaleLeast concern
Rare
Now and then
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