Hin Daeng Diving from Koh Lanta: Who It Suits and How to Go
Hin Daeng is a remote open-sea pinnacle for experienced divers. See boat choices, conditions, marine life and how to book from Koh Lanta.
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Last updated November 2026: Hin Daeng, the "Red Rock", is a remote open-sea pinnacle southwest of Koh Lanta, and it suits experienced divers. Day trips from Lanta usually pair it with Hin Muang, its submerged neighbor. Our guide covers who should go, what you see and how to book, as part of the wider Koh Lanta diving guide.
Featured image: (c) portioid, some rights reserved (CC BY-SA), CC BY-SA 4.0, via Wikimedia Commons.
Hin Daeng at a Glance
Hin Daeng means "Red Rock" in Thai, a name tied to the red corals on its walls. Out in the Andaman Sea, it breaks the surface by about 3 m (10 ft). Below the waterline, the south and southwest sides drop past 60 m (200 ft), far beyond recreational limits. Typical dive profiles run from 5 to 40 m (16 to 130 ft). There is no beach, no snorkeling and no reason to visit except to dive.
- What: an isolated open-sea pinnacle, paired with Hin Muang
- Where: southwest of Koh Lanta, south of Phi Phi
- Depth: 5-40 m (16-130 ft) on typical dives; 60+ m (200 ft) on the deep faces
- Level: experienced divers, with currents and deep water in play
- Trip format: full-day boat trip from Koh Lanta
Is Hin Daeng Right for You?
Treat this as an advanced site. Currents can be strong, you may enter the water in open sea, and the best action often happens in the blue. Most operators ask for an advanced-level certification, such as PADI Advanced Open Water, plus a minimum number of logged dives. Each operator sets its own rules. Read the PADI certification levels to see where you stand. If you need the course first, look at PADI courses on Koh Lanta. If you only need more dives, book local fun dives to build experience before the long trip. Divers should also look at Divers Alert Network guidance on dive insurance and fitness before a deep, remote day.
Typical dives run 5-40 m (16-130 ft), so check that range against your certification before booking a day trip.
- Skip it if you are newly certified or have few logged dives.
- Skip it if you are prone to seasickness, since there is no shelter at sea during surface intervals.
- Skip it if you need a guaranteed big-animal sighting.
What You Will See Underwater
Hin Daeng is a wall dive first. The eastern side has the best soft coral growth, while the south and southwest faces plunge into deep blue. Expect leopard sharks resting at depth, gray reef sharks, barracuda, trevally, rainbow runners and fusiliers. Moray eels hide in cracks on the shallower rock. Manta rays and whale sharks are regular visitors, but sightings are never guaranteed. One operator reports better odds toward the end of the season. Read our whale shark sighting guide for realistic odds. If a manta appears, stay calm and hold your position. Chasing one pushes it away and spoils the encounter for the whole group. Watch your hands too, since scorpionfish sit camouflaged on the rock.
Getting There from Koh Lanta
Expect a full day. The sites sit well offshore, so the open-sea transit is long, and the exact duration depends on the boat. Divers report that only a few Lanta operators run a boat fast enough for the trip. Ask your operator for the departure point and travel time, or start with the Koh Lanta Dive Center: How to Choose the Right Dive Shop page. Trade-offs below are reader-reported rather than measured.
| Boat type | Comfort and shelter | Group size | Seasickness risk |
|---|---|---|---|
| Small speedboat | Limited deck space, rough surface intervals | Small | Higher, as divers report |
| Large fast catamaran | More comfort and shade | Larger | Lower |
| Liveaboard | Sleeps aboard, most flexible | Varies | Lower once anchored |
- Which boat runs the trip, and how fast is it?
- How many divers are aboard?
- What certification and logged-dive minimum applies?
- How many dives run that day, and at which sites?
- Does the trip run on a set schedule?
- What happens if the sea is too rough?
Best Time to Dive Hin Daeng
Day trips run in the high season, and rough seas can cancel them. Our month-by-month diving season guide shows when conditions suit open-sea trips. Cooler, nutrient-rich currents feed the reef, so check the sea temperature page before packing your exposure protection.
What a Hin Daeng Day Trip Costs and What Affects It
No current price is confirmed for this trip. Ask the operator for a written quote and use the lines below as your checklist.
- Day-trip fee and number of dives included
- Gear rental
- Park or marine fees, if any
- Nitrox
- Hotel transfers
Combining Hin Daeng with Hin Muang and Koh Haa
Most visitors dive both pinnacles in one trip. Operators often start at Hin Muang, then move to Hin Daeng. Hin Muang stays fully submerged, is about 200 m (660 ft) long and under 20 m (66 ft) wide, and takes its name from purple soft corals. Our Hin Muang dive guide covers that reef in detail. Koh Haa is a separate group of five small islands, and Ha means five in Thai. See the Koh Haa dive site guide if you prefer caverns and calmer lagoon diving. Compare other options on our Koh Lanta Dive Sites: Depths, Levels, Costs & Season page.
Moving from Hin Muang's reef, which is under 20 m (66 ft) wide, to Hin Daeng's 60+ m (200 ft) drop changes depth fast.
| Feature | Hin Daeng | Hin Muang |
|---|---|---|
| Name | Red Rock | Purple Rock |
| Surface | Breaks the surface by about 3 m (10 ft) | Fully submerged |
| Best known for | Wall, eastern soft corals, deep blue | Pinnacle tops, purple soft corals, fish schools |
| Deep water | 60+ m (200 ft) on south and southwest | Walls drop away sharply |
Frequently Asked Questions
Where can a beginner dive in Thailand?
Beginners should start closer to shore, because Hin Daeng is an advanced open-sea site. Around Koh Lanta, book supervised fun dives or a course, then return for the pinnacles once you have logged more dives.
Notes for your next dive trip
Optional updates to our Thai diving guides.
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