Dive Site: Hin Daeng

About Hin Daeng

Hin Daeng, meaning "Red Rock" in Thai, is a world-renowned dive site situated in the Mu Koh Lanta National Park, approximately 55 km south of Koh Lanta. It is widely regarded as one of the premier diving destinations in Thailand, particularly noted for its potential sightings of large pelagic species such as manta rays and whale sharks. The site is a submerged pinnacle, with only three small rock outcrops visible above the surface. Below the water, it plunges dramatically to a sandy bottom at depths exceeding 40 meters, forming a vast underwater mountain. The name "Red Rock" comes from the extensive covering of healthy red soft corals that adorn its slopes and walls, creating a striking visual spectacle. Nutrient-rich waters surrounding Hin Daeng attract a diverse array of marine life. Beyond the impressive pelagics, divers can expect to see abundant schools of barracuda, trevallies, and fusiliers, alongside a healthy reef ecosystem populated by triggerfish, unicornfish, angelfish, butterflyfish, and various moray eels. Macro life, including nudibranchs and ghost pipefish, also thrives in its crevices. Diving Hin Daeng typically involves strong currents and significant depths, making it best suited for experienced divers. Liveaboard trips from Phuket or day trips from Koh Lanta are common, with speedboats offering the quickest access. Divers can explore extensive coral walls, reef slopes, and channels, always keeping an eye on the blue for passing giants.

Dive site facts: Hin Daeng

Depth

0-50 m

Typical dive

12-30 m, 50-60 min

Current

Moderate to strong

Visibility

15-30 m

Water temperature

27-30°C

Entry

Negative entry / liveaboard tender

Level

Advanced, current experience essential

Dive type

Pinnacle, wall, drift

Night dive

Not commonly offered

Region / port

Mu Koh Lanta National Park / Southern Andaman Sea

Coordinates

7.1345, 98.9567

Conditions & Currents

Hin Daeng is an exposed site in open seas where currents can range from moderate to strong, making it a challenging dive suitable for experienced divers. The pinnacle structure can accelerate water flow over its upper surfaces, and divers should be prepared for drift diving conditions. While there are sheltered areas on the leeward side of the rocks, much of the action occurs in the currents, which also contribute to the abundance of pelagic life. Divers need to plan their entry and exit carefully, often involving negative entries to quickly descend to the reef. Surface conditions can also be choppy, requiring quick transitions onto or off the boat. Visibility is generally good, often 15-30 meters, but can decrease if plankton blooms, which also attracts large pelagics.

Marine life & sighting chances

Manta Ray

March-April · occasional

Whale Shark

February-April · rare

Leopard Shark

occasional

Grey Reef Shark

occasional

Barracuda

common

Giant Moray Eel

common

Redtooth Triggerfish

common

Unicornfish

common

Angelfish

common

Butterflyfish

common

Fusilier

common

Ghost Pipefish

occasional

Nudibranch

occasional

Dive profile & how the dive runs

Diving Hin Daeng typically begins with a negative entry, as the currents can be strong, requiring a quick descent to the main pinnacle. You'll typically start on the western side, exploring the impressive wall covered in red soft corals. The dive usually progresses by drifting along the long rocky wall that extends from the west to the south side, maintaining depths between 15-30 meters to maximize bottom time. Keep an eye on the blue water for pelagic sightings. For the second half of the dive, transition to the east and northeast sides, which feature a reef slope with hard corals and smaller pinnacles. Your turn point will depend on air consumption and the current strength, but it's important to be aware of the boat's location for pick-up. The safety stop can be conducted in shallower areas around 5-8 meters where hard corals provide shelter and a chance to observe smaller reef fish, before surfacing away from the main rock to meet the dive boat.

Underwater photography

Hin Daeng offers fantastic photographic opportunities for both wide-angle and macro enthusiasts, but strong currents demand excellent buoyancy control. For wide-angle shots, a fisheye or wide-angle lens is ideal to capture the expansive soft coral walls and the dramatic seascape. When pelagics like manta rays or whale sharks appear, be ready to capture their majestic presence against the blue. Consider using strobes to bring out the vibrant red hues of the soft corals, as natural light diminishes quickly at depth. For macro photography, focus on the abundant nudibranchs, ghost pipefish, and various small reef inhabitants found in sheltered crevices along the walls and slopes. Due to potential currents, secure your camera setup and be mindful of other divers to avoid accidental contact. Patience is key, especially when waiting for shy subjects or perfect pelagic encounters.

Combine with nearby dive sites

• Hin Muang

  Connected by a deep ridge, renowned for purple corals and large pelagics

• Koh Haa — The Chimney

  Features unique swim-throughs and a rich lagoon

• Koh Phi Phi — Bida Nok

  Offers impressive reef formations and diverse marine life

• Koh Phi Phi — Bida Nai

  Known for caves, caverns, and healthy coral gardens

Getting there & logistics

Access to Hin Daeng is primarily from Koh Lanta, Phuket, or via liveaboards operating in the Southern Andaman Sea. From Koh Lanta, speedboats offer the shortest journey times, typically departing for day trips that include multiple dives. From Phuket, it's a longer day trip, often requiring a private group charter due to the 100 km distance. Liveaboards provide the most convenient option, often combining Hin Daeng and Hin Muang with other sites like Koh Haa and the Phi Phi Islands into multi-day itineraries. The closest international airport is Krabi International Airport (KBV) for Koh Lanta, or Phuket International Airport (HKT) for Phuket departures. Hin Daeng is located within the Mu Koh Lanta National Park, and park fees are typically included in dive trip costs.

Safety & environment

Diving Hin Daeng requires careful consideration of safety due to its exposed location and potentially strong currents. Divers should have recent experience with deeper dives and current conditions. Always dive with an experienced guide and maintain excellent buoyancy. It's crucial to stay close to your dive group and use surface marker buoys for visibility during ascent and after surfacing, as boat traffic can be present. The nearest recompression chamber is located in Phuket, highlighting the importance of comprehensive dive insurance that covers emergency medical evacuation. Divers should be physically fit and well-rested. Always perform a thorough buddy check and ensure all equipment is in excellent working order.

Who it suits — and who it doesn't

FAQ

Hin Daeng FAQ

Liveaboards diving Hin Daeng

These liveaboards may visit Hin Daeng on selected itineraries — the exact dive sites depend on departure, weather and conditions.

Mandarin Queen 9

Thailand

26 guests37.5 m

Manta Queen 8

Thailand

24 guests

$127/day

The Junk

Thailand

18 guests33 m

$163/day

Deep Andaman Queen

Thailand

23 guests30.5 m

$194/day

Explorer

Thailand

16 guests25 m

$150/day

Andaman

Thailand

20 guests26 m

$108/day

Stingray

Thailand

8 guests24 m

$245/day

Seatopia

Thailand

24 guests24 m