Trang Islands · Thailand · Wall · Reef
Koh Waen
A wall covered in purple and white soft corals, home to nudibranchs and tiny shrimps
Photo: Krzysztof Golik · CC BY-SA 4.0
Koh Waen is a small uninhabited limestone island whose reefs carry diverse hard coral species from 5 m down to 30 m. Its walls and overhangs are the draw: soft corals for macro hunting, sharks tucked under ledges and stingrays on the sand, plus the Black Pearl cave for experienced divers.
Also known as Ko Waen, Koh Wean.
Where it is and how deep
7.3796° N, 99.2474° EApproximate position — the dashed circle shows where the site lies; your operator's briefing has the mooring.
The dive
The limestone island has walls, and one of them is covered in purple and white soft corals where divers search for nudibranchs and tiny shrimps. Along the overhangs nurse and reef sharks sometimes hide, while stingrays rest on the sand. The site runs from 5 m down to 30 m over diverse hard corals. Experienced divers can add the Black Pearl cave, Koh Waen's own 'cathedral'.
Marine life and season
- Stingrays
- Reef sharks
- Nudibranchs
- Macro critters
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Prime | Prime | Prime | Prime | Off-season | Off-season | Off-season | Off-season | Off-season | Off-season | Prime | Prime |
Season follows Trang Islands: Diving runs November to April, the dry season; Ko Hai Divers on Koh Ngai is shut from May to October.
Dive videos
KOH WAEN scubadiving - Andaman sea - THAILAND 2025 · Yayan Around The World on YouTube
Sources
- Koh Waen - ScubaGo — ScubaGo
- Dive Sites - Ko Hai Divers — Ko Hai Divers
- Scuba Fun Diving — Nice Dive Club
Photo credits
- A longtail boat with people in orange life jackets passing a rounded, jungle-covered limestone islet on a grey sea by Krzysztof Golik, CC BY-SA 4.0, via Wikimedia Commons
More dive sites in Trang Islands
Pinnacle
A pinnacle whose top only just pokes out of the sea
Twenty railway wagons still sitting on their train rails
Artificial reef
Man-made reef structures 2 km off Koh Libong
Similar dives elsewhere
A limestone wall running from the surface to 33 m
A wall to 30 m and the soft-coral spur called Finger Reef
Gorgonian fans below, blacktip reef sharks along the shallow top
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Crevices and overhangs down a 10 to 30 m wall