How deep is Koh Bida Nai?

Koh Bida Nai ranges from 5 to 28 metres and is suited to beginner divers. It is a reef dive with mild current.

When is the best time to dive Koh Bida Nai?

The season is Nov – Apr. Expect 15–30 m visibility and 28–30 °C water.

How do you get to Koh Bida Nai?

Day trip · 2 h from Chalong. It is in the Phi Phi area at 7.6575° N, 98.7670° E.

What marine life can you see at Koh Bida Nai?

Hawksbill turtle, Bamboo shark, Moray eel, Trevally. Highlights include gentle reef slope; turtle sightings most days; giant gorgonian fans.

← Dive mapBeginnerReefPhi Phi

Koh Bida Nai

Depth

5–28 m

Visibility

15–30 m

Water

28–30 °C

Current

Mild

Season

Nov – Apr

Getting there

Day trip · 2 h from Chalong

Coordinates

7.6575° N, 98.7670° E

Verified

2026-09-12

Bida Nok's calmer neighbour. Same limestone drama, softer current, and a turtle that seems to be on every second dive.

Highlights

Gentle reef slope
Turtle sightings most days
Giant gorgonian fans

What you'll see

Hawksbill turtleBamboo sharkMoray eelTrevally

Photos: Donald Davesne, Christophe95, portioid via Wikimedia Commons · licences

Phi Phi — Andaman Sea scenery near Koh Bida Nai

Koh Bida Nai, in brief

How deep is Koh Bida Nai?: Koh Bida Nai ranges from 5 to 28 metres and is suited to beginner divers. It is a reef dive with mild current.
When is the best time to dive Koh Bida Nai?: The season is Nov – Apr. Expect 15–30 m visibility and 28–30 °C water.
How do you get to Koh Bida Nai?: Day trip · 2 h from Chalong. It is in the Phi Phi area at 7.6575° N, 98.7670° E.
What marine life can you see at Koh Bida Nai?: Hawksbill turtle, Bamboo shark, Moray eel, Trevally. Highlights include gentle reef slope; turtle sightings most days; giant gorgonian fans.

Pack for this dive

Gear we'd bring to Koh Bida Nai

First computer

Suunto

Suunto Zoop Novo

If you just got certified at Racha Yai, this is the computer your instructor probably wore. Nothing to break, nothing to charge.

$329Suunto ↗

Best seal

Scubapro

Scubapro Synergy 2 Trufit

The skirt that fits faces other masks leak on. Low volume, quick to clear, no fuss.

$139Scuba.com ↗

Classic

Mares

Mares Avanti Quattro+ Fins

The fin every rental shop in Chalong owns for a reason. Buy your own pair and stop guessing sizes.

$159Scuba.com ↗

Trips that diveKoh Bida Nai

Day trip
Phi Phi Three-Dive Day
Three dives around the Bida islands — walls, sharks, turtles — with lunch under the cliffs of Phi Phi Leh.
from $145 · via DivebookerBook →Details

Next siteHin Bida