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Dive Spot Guide•
Koh Bida Nai
Limestone islet dive with walls, swim-throughs, and reef life.
Local operator required
Boat logistics, marine park rules, and current windows make this best with a local operator.
Boat-trip reef and wall dive with moderate currents, good coral structure, and a strong fit for mixed wide-angle and macro plans.
About Koh Bida Nai
Koh Bida Nai is a limestone-islet dive built around coral-encrusted boulders, swim-throughs, and reef walls in the Phi Phi National Marine Park. The site mixes a shallow coral slope with deeper wall sections, so it works well as a boat-day-trip dive for divers who want structure, reef life, and a site that can handle both wide-angle passes and macro hunting when conditions are calm to moderate.
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Research Estimate At Koh Bida Nai
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 15m
AccessSimple entry
CoralHealthy coral
Aquatic LifeExceptional variety
FacilitiesGood facilities
Crowd / PopularityQuite busy
CurrentModerate current
Where Is Koh Bida Nai?
This spotNearby spotsExplore nearby spots on the map
Community sourced coordinates.
Koh Bida Nai Planning Details
Depth range, seasonality, and planning context.
Reported Depth
18m - 25m
Depth Note
Coral garden sections begin shallow, while the east pinnacle and wall sections reach into deeper water across the island profile.
Best Season
Year-round, with calmer dry-season conditions usually making the easiest boat days.
Typical Conditions
Moderate currents, 5-25m visibility, and a mix of shallow coral slope, swim-throughs, and wall sections.
Safety & Access At Koh Bida Nai
Hazards, restrictions, and access requirements.
Key Hazards
Overhead environment
Safety Notes
Swim-throughs are present among the boulders; use appropriate buoyancy control and maintain awareness of overhead sections.
Access Restrictions
Boat access only inside Phi Phi National Marine Park; plan for park fees and operator coordination.
Legal Notes
Phi Phi National Marine Park rules and fees apply; follow local operator guidance and leave coral and marine life untouched.
Local Intel For Koh Bida Nai
Community notes to help plan your visit.
Scuba Diving
Suitable for wall and reef diving with swim-throughs, spanning approximately 18–25 m.
Freediving
Shallow reef sections can suit competent freedivers, but the walls and swim-throughs are better treated as scuba terrain.
Snorkeling
Snorkeling is possible around the shallower reef, but the best structure sits on the walls and coral slope.
Wildlife at Koh Bida Nai
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Koh Bida Nai
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Koh Bida Nai
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility15m
Activity
No dive activity logged yet.
