Bida Nok

Krabi, Thailand

Depth

32m

Visibility

15m - 45m

Entry

Boat

Experience Level

Experienced

About Bida Nok

Also known as Outer Father Island. Bida Nok is situated close to Bida Nai and shares a very similar underwater terrain. Made from limestone cliffs that extends into waters no deeper than 32 meters. Here you will find beautiful coral decorated reefs teeming with marine life. Bonus is that Bida Nok is situated in a well protected bay area, making this dive easy to handle. Calm sea conditions and much to see and explore.

Bida Nok Dive Info

Terrain & Features

Rock, Other, Reef

Entry Type

Boat

Max Depth

32m

Visibility Range

15m – 45m

Experience Level

Experienced

Best Gas Mix

21% – 33%

O₂

CNS Load (20 min)

13% at 30m / 35%

O₂

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Marine Life

Box Fish
Cuttle Fish
Groupers
Leopard Sharks
Lion Fish
Moray Eels
Snappers
Turtles
Various
Whale Sharks
Wrasse

Weather Conditions

Water Temperature ℃

Dive Operators near Bida Nok

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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.

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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