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Ni'ihau Arches

Ni'ihau Arches

Hawaii, United States

Depth
Depth Icon

25m

Visibility
Visibility Icon

18m - 54m

Entry
Boat Entry Icon

Boat

Experience Level

Advanced

Ni'ihau Arches

Hawaii, United States

Ni'ihau Arches
Depth
Depth Icon

25m

Visibility
Visibility Icon

18m - 54m

Entry
Boat Entry Icon

Boat

Experience Level

Advanced

About Ni'ihau Arches
This site is located off the island of Niihau at East Kikepa Point. A 10 meter archway gives this site its name. The population of the island is less than 300, consisting mostly of Hawaiian-speaking ranchers. Ni'ihau's has a dry climate and there is lack of fresh water. It is located among formations such as valleys, ridges and lava tubes up to 30 meter in length. There are arches, swim throughs and large caves formed by swirled lava with sink holes and pinnacles. Bring a light on this one as some of these caves are very large. There is a vertical wall nearby. This is a great place to watch large fish.

Ni'ihau Arches Dive Info

Terrain & Features

Wall, Reef, Cave

Entry Type

Boat

Max Depth

25m

Visibility Range

18m – 54m

Experience Level

Advanced

Best Gas Mix

21% – 40%

O2
CNS Load (35 min)

16% at 23m / 36%

O2
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Marine Life
  • Blacktip Sharks
  • Collector Crabs
  • Eagle Rays
  • Galapagos Sharks
  • Galápagos Sharks
  • Lobster
  • Moray Eels
  • Morwongs
  • Octopuses
  • Soldierfish
  • Tiger Cowries
  • Wahoos
  • Whitetip Reef Shark
Weather Conditions

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Dive Operators near Ni'ihau Arches

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Location

Location details missing.

Dive Site Hazards

  • Unstable Visual Ascents — Relying on wall visuals can destabilise ascents.

  • Gradual Depth Creep — Lack of visual bottom reference can cause unnoticed descent.

  • Unsignalled Downcurrents — Downcurrents can form without visible indicators.

  • Hidden Depth Variations — Complex reef topography can conceal depth changes, leading to unintended profile variations.

  • Distraction from Marine Activity — High fish activity can distract divers and delay depth or gas awareness.

  • Rapid Surge Direction Changes — Surge near reef structures can reverse direction quickly, pushing divers sideways into unexpected areas.

  • Remote Silt Disturbance — Silt can be disturbed metres away from the source.

  • Rapid Stress Escalation — Stress can increase sharply when visibility or navigation degrades.

  • High Cognitive Load Navigation — Complex passages increase mental workload even on a line.

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