Dive Koh Lanta National Parks – Best Scuba Diving in Thailand

Koh Lanta is a diver’s paradise in southern Thailand, perfectly located near some of the best dive sites in the Andaman Sea. From the coral-fringed Koh Haa islands and the pristine waters of Koh Rok, to the deep pinnacles of Hin Daeng and Hin Muang, this region offers world-class scuba diving experiences for divers of all levels.

Koh Lanta National Park is a protected area on the southern tip of Koh Lanta Island in Krabi Province, covering 134 square kilometers. Established in 1990, the park preserves lush forests, pristine beaches, and vibrant coral reefs. Visitors can explore by hiking, snorkeling, or diving, making it an ideal destination for eco-adventurers and underwater photographers alike.

Best Dive Sites Near Koh Lanta

Hin Daeng – Red Rock Pinnacle Dive

Type: Pinnacle, Wall Dive, Coral Garden
Depth: 5–50 meters
Visibility: 15–30 meters
Difficulty: Advanced
Currents: Moderate to Strong
Marine Life: Reef sharks, manta rays, whale sharks, barracuda, trevally, colorful reef fish

Hin Daeng, meaning "Red Rock" in Thai, features two submerged pinnacles covered in vibrant soft corals and sea fans. This site is renowned for thriving marine life, including schools of tuna, barracuda, trevally, and reef sharks. Advanced divers also have opportunities to encounter manta rays and whale sharks during peak season (December–April).

Recommended for wide-angle and macro underwater photography.

Hin Muang – Purple Rock Pinnacle Dive

Type: Pinnacle, Wall Dive, Coral Garden
Depth: 8–60 meters
Visibility: 15–30 meters
Difficulty: Advanced
Currents: Moderate to Strong
Marine Life: Whale sharks, manta rays, leopard sharks, reef fish, nudibranchs

Located just southeast of Hin Daeng, Hin Muang ("Purple Rock") rises sharply from the sea floor to near the surface. The pinnacle is adorned with soft corals, sponges, and sea fans. Divers can spot large pelagic species such as whale sharks and manta rays, along with abundant tropical fish.

This site is ideal for wide-angle shots of pinnacles and macro photography of invertebrates.

Koh Haa – Five Islands Diving Adventure

Koh Haa, meaning “five islands,” is a cluster of islands surrounded by crystal-clear waters, featuring shallow coral gardens, dramatic walls, and underwater caves. The islands include Koh Haa Yai, Koh Haa Lagoon, Koh Haa Neua, Koh Haa Sam, and Koh Haa Chan.

Top Koh Haa Dive Sites

The Chimney – Wall dive and cave exploration with vibrant soft corals. Depth: 5–27 meters. Moderate currents. Marine life: Glassfish, moray eels, lionfish. Suitable for Open Water divers and above.

The Lagoon – Shallow coral garden, ideal for beginners. Depth: 0–6 meters. Calm waters, excellent for check dives. Marine life: Butterflyfish, angelfish, parrotfish.

The Cathedral – Large cavern with sunlight filtering through an open-top ceiling, creating stunning visuals. Depth: 5–30 meters. Moderate currents. Marine life: Barracuda, lionfish, nudibranchs.

Koh Haa dive sites are perfect for underwater photography enthusiasts and divers seeking both adventure and relaxation.

Koh Haa Marine Life Highlights

Koh Haa offers diverse marine biodiversity, including:

• Reef Fish: Angelfish, butterflyfish, parrotfish, triggerfish, snappers, barracuda
  
  

• Turtles: Green sea turtles, hawksbill turtles
  
  

• Sharks: Reef sharks, leopard sharks, whale sharks
  
  

• Rays: Stingrays, eagle rays, manta rays
  
  

• Macro Creatures: Nudibranchs, octopus, cuttlefish
  
  

With calm waters from November to April, Koh Haa is perfect for scuba diving in Thailand, offering clear visibility, calm currents, and unforgettable encounters with marine life.

Why Dive Koh Lanta?

Koh Lanta is one of the most accessible dive destinations in Thailand. With nearby world-class dive sites like Hin Daeng, Hin Muang, and Koh Haa, it’s ideal for:

• Advanced divers seeking pelagic encounters and deep walls
  
  

• Beginner divers exploring shallow coral gardens
  
  

• Underwater photographers capturing vibrant reef ecosystems
  
  

Whether you’re chasing manta rays, swimming with whale sharks, or exploring coral gardens and caves, diving around Koh Lanta guarantees an unforgettable underwater adventure in the Andaman Sea.

South Andaman Thailand Diving Liveaboards – Full Cruise Schedule & Trips