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High Rock

High Rock

Hawaii, United States

Depth
Depth Icon

18m

Visibility
Visibility Icon

13m - 38m

Entry
Boat Entry Icon

Boat

Experience Level

Beginner

High Rock

Hawaii, United States

High Rock
Depth
Depth Icon

18m

Visibility
Visibility Icon

13m - 38m

Entry
Boat Entry Icon

Boat

Experience Level

Beginner

About High Rock
This area is made up of large old lava flows, giving the diver many pinnacles and archways to explore. It has a variety of marine fish and coral formations.

High Rock Dive Info

Terrain & Features

Rock, Drift, Drop Off

Entry Type

Boat

Max Depth

18m

Visibility Range

13m – 38m

Experience Level

Beginner

Best Gas Mix

21% – 50%

O2
CNS Load (45 min)

13% at 16m / 36%

O2
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Marine Life
  • Banded Coral Shrimps
  • Butterfly Fish
  • Hellers Barracuda
  • Octopus
  • Pennat Fish
  • Turtles
  • Various
Weather Conditions
Water temperature (℃)
Air temperature range (℃)
Average air temperature (℃)
Wind speed (km/h)
Precipitation (mm)
Dive Operators near High Rock
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Location
Dive Site Hazards

  • Bubble Trapping Under Overhangs — Rock overhangs can trap exhaled bubbles, reducing visibility and causing disorientation.

  • Reflected Surge Patterns — Surge reflecting off rock faces can create irregular and unpredictable water movement.

  • Current Funnel Effect — Narrow gaps between rocks can accelerate water flow unexpectedly.

  • Eddy Pull-Off Zones — Eddies behind structures can pull divers away from the main drift line.

  • Delayed Surface Pickup — Strong current can exceed surface tracking assumptions, delaying boat pickup.

  • Vertical Current Shear — Currents may vary by depth, causing vertical separation even when divers stay together.

  • Edge-Accelerated Currents — Currents often strengthen along drop-off edges.

  • Depth Perception Distortion — Visual contrast can distort perceived depth.

  • Terrain-Induced Descent — Divers may unintentionally follow terrain downward.

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