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Port Island

Port Island

Hong Kong, China

Depth
Depth Icon

25m

Visibility
Visibility Icon

5m - 15m

Entry
Boat Entry Icon

Boat

Experience Level

Advanced

About Port Island
This small island is located on the end of Tai Po Channel. The island has a beautiful lighthouse and 3 small bay areas, offering diving for all levels. Bottom consists of sand and scattered rock formations, teeming with marine life. Currents can be strong, so beginner divers are advised to dive in groups or with instructors. Lots of corals to be seen.

Port Island Dive Info

Terrain & Features

Other, Rock, Drift, Reef

Entry Type

Boat

Max Depth

25m

Visibility Range

5m – 15m

Experience Level

Advanced

Best Gas Mix

21% – 40%

O2
CNS Load (35 min)

16% at 23m / 36%

O2
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Marine Life
  • Various
  • Jelly Fish
  • Groupers
  • Sharks
  • Nudibranchs
  • Turtles
Weather Conditions
Water Temperature ℃
Dive Operators near Port Island
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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.

  • 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.

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