Hin Daeng

Verified2026-09-30 checkedWallPelagicDrift

Thailand’s deepest wall, sixty kilometres from land, and the country’s best chance of both a manta and a whale shark.

Depth: 10–50 m33–164 ft
Difficulty: Advanced
Entry: Boat · Liveaboard
Typical current: Strong
Coordinates: 7°19.002′N 99°1.998′E
Activities: Scuba · Technical

Hin Daeng is a rock that barely clears the surface in the open Andaman sixty kilometres off Koh Lanta, and its south wall drops past 50 m into blue. The whole thing is covered in soft coral — the red that gives it its name — and the current that feeds that coral is what brings the mantas and the whale sharks, often in the same week in February and March. Its neighbour Hin Muang is 200 m away and deeper again. This is an advanced dive: depth, current, no shallow refuge, and a long way back.

Day boat from Koh Lanta, two and a half hours, or a liveaboard out of Phuket.

Best season

ExcellentDec–Apr
GoodNov

Before you get in

Deeper than recreational limits. It carries a decompression obligation and gas planning, and is not a dive to plan without that training.
A wall. There is no bottom in sight to judge against, so depth is kept by the gauge alone — and it is easy to end up deeper than intended.
Recorded as a site with strong current. Settle your gas reserve, when you would call the dive, and your surface signal before you get in.
A drift dive: you do not come back to where you went in, so boat pickup and an SMB are part of the plan rather than extras.

Taken from this site’s recorded depth, type and current, and nothing else. An empty list is not a safe site — the sea on the day, the local geography and the boat traffic are not in it. The briefing on the spot comes first.

Conditions

Water temperature: 30.8°C87°F
Wave height: 0.2 m1 ft
Air temperature: 27.8°C82°F
Wind speed: 17.4 km/h10.8 mph

Updated 2026-10-07 15:45 UTC · Source: Open-Meteo

Weather data by Open-Meteo.com (CC BY 4.0)

Conditions are reported for information only. Assess the site yourself and follow your guide and your training.

No live conditions for this site yet.

We only show numbers we can attribute to a source.

Sea state and tide

On a date

Tide · 10/7

Low01:41-0.10 m
High07:491.30 m
Low14:14-0.43 m
High20:241.38 m

Forecast heights against mean sea level. Real tides in a bay, a harbour or over a flat can differ — check an official tide table before you get in.

Pick a day to see its tide

Only wave height and wind are scored, because those are what close a boat ramp or a shore entry. Water temperature is reported and never scored: 12°C is an ordinary dive in a drysuit and punishing in a 3 mm, and a number that cannot see your suit has no business marking it down. Stars do not decide whether you get in — you and your guide do, on the day.

Weather data by Open-Meteo.com (CC BY 4.0)

Marine life you may see

Reef manta rayMobula alfrediFeb–AprSeasonal
Whale sharkRhincodon typusFeb–AprSeasonal
Soft coralDendronephthya spp.Common
Leopard (zebra) sharkStegostoma tigrinumSeasonal
Bigeye trevallyCaranx sexfasciatusCommon
Moorish idolZanclus cornutusCommon
Feather starCrinoideaCommon
Blackfin barracudaSphyraena qenieCommon

From divers

What people who were in the water reported. Not a forecast, and not a judgement about whether the site is safe to dive.

No recent reports from divers. If you dived here in the last two weeks, you can say how it was.

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