www.phuketdiveguide.com · Dive Guide
Dive map and site guide covering arches, coral gardens, leopard sharks, blacktips, and wall depth.
Dive Spot Guide•
Koh Bida Nai
Popular Phi Phi limestone reef with coral gardens, sharks, and turtle sightings.
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Local operator required
This site is normally visited on guided boat dives, and operators often choose the exact route based on tide, current, and overall group suitability.
Koh Bida Nai mixes shallow coral gardens and sandy ledges with arches, walls, and outer reef lines, so one dive can feel calm and easy while the next is more current-driven.
About Koh Bida Nai
Koh Bida Nai is the inside Bida island south of Phi Phi Leh, where shallow coral gardens, sandy ledges, arches, and outer wall sections pack a lot of variety into one compact boat dive. The calm reef sections suit relaxed sightseeing, while the exposed corners and walls reward a guide who can read the tide and choose the right route for the day.
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Research Estimate At Koh Bida Nai
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 15m
AccessModerate entry effort
CoralHealthy coral
Aquatic LifeGreat variety
FacilitiesBasic facilities
Crowd / PopularityQuite busy
CurrentModerate current
Where Is Koh Bida Nai?
This spotNearby spots
Community sourced coordinates.
Koh Bida Nai Planning Details
Depth range, seasonality, and planning context.
Reported Depth
3m - 30m
Depth Note
Shallow plateaus and reef tops can start around 3 m, while the sloping wall and outer reef commonly continue to about 25-30 m.
Best Season
Koh Bida Nai can be dived much of the year, with calmer boat conditions typically favored from November to April, while some June to October periods can bring very clear water and occasional larger pelagic sightings.
Typical Conditions
Expect limestone structure, coral gardens, sand patches, and variable tide-driven current, with visibility often good enough for blue-water fish watching on the outer edge.
Safety & Access At Koh Bida Nai
Hazards, restrictions, and access requirements.
Key Hazards
Overhead environmentStrong current
Safety Notes
The easiest reef sections are shallow, but current and depth increase around the outer wall and corners. Treat caves, arches, and swim-through features as optional terrain and follow the route your guide chooses for the tide.
Access Restrictions
Boat access only; Koh Bida Nai is dived from Phi Phi or longer-range day boats from Phuket and nearby mainland bases.
Legal Notes
Phi Phi Marine Park entry rules and park-pass fees can apply on this itinerary; follow the operator's route choices and any marine-park limits for the day.
Local Intel For Koh Bida Nai
Community notes to help plan your visit.
Scuba Diving
Koh Bida Nai works as an easy reef dive on calm days, but many divers remember it for shark patrols, stingrays on sand, and current-sensitive wall sections around the island's outer edge.
Freediving
Shallow reef tops and sheltered coral patches can work for calm snorkel or breath-hold sessions, but the outer wall and current-exposed corners are better left to scuba divers with a guide.
Snorkeling
Shallow coral areas make Koh Bida Nai one of the more approachable snorkel stops around Phi Phi when sea state is calm, though the stronger wildlife action is usually deeper along the dive route.
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.
