Boat access from Krabi region and site profile around Phi Phi dive trips.
Thailand · Koh Lanta · Koh Phi Phi (Phi Phi Islands) · Krabi (Ao Nang and Railay) · Phuket
Deep limestone wall with swim-throughs and coral formations.
Deep limestone wall with swim-throughs and coral formations.
Bida Nok Deep Site is a deeper limestone wall dive in Thailand with swim-throughs, large coral formations, and varied contours across multiple depth levels. It suits advanced scuba divers who want dramatic walls, short overhead sections, and busy fish life.
Site Conditions
Safety Notes
Swim-throughs add overhead exposure; plan depth and gas management appropriately for dives approaching 30 m.
Access Restrictions
Boat access from Phi Phi is the normal approach, and conditions outside the bay can become current-prone.
Legal Notes
The site sits inside an underwater national park, so operator guidance and park rules matter.
Community notes to help plan your visit.
Scuba Diving
Offers a range of depths, with deeper sections around 30 m and wall diving with swim-throughs.
Freediving
Experienced freedivers may use the shallower bay sections, but the site remains best known as a technical boat dive.
Species commonly reported at this site, with direct links into their wildlife guides.
Conservative baseline from public research. No community dives logged yet.
Last Updated
Research Sources
Boat access from Krabi region and site profile around Phi Phi dive trips.
Site terrain, current, and marine life notes for Koh Bida Nok.
Portal page covers 0-28m depth, variable mild-to-medium current, hard corals, large sponges, and national-park restrictions.
Community depth and visibility ranges aligned with operator descriptions.
Easy dive site page covers boat access, blacktip sharks, turtles, snappers, rays, and variable current outside the bay.
Operator page highlights blacktip reef sharks, leopard sharks, and turtles around Koh Bida.
Operator page covers wall topography, the cleft/cut-through, giant trevally, turtles, shrimps, and snapper schools.

Exposed Racha Noi pinnacle with strong current and pelagic action.

Strong-current Racha Noi drift dive with manta chances.

Racha Noi reef with shallow bay and coral blocks