Only accessible by boat, Koh Haa is most often visited on day trips from Koh Lanta, Koh Phi Phi, Krabi, or Phuket. You can swim and kayak in the shallow protected lagoon formed by three of the islands, and relax on a small sandy beach. Exploring by liveaboard scuba diving boat lets you access more than a dozen dive sites for different levels. Some day trips also stop at Koh Rok, and typically last eight hours.
Koh Haa is ideal for scuba divers, snorkelers, and free divers.
You’ll need to pay an entrance fee to Koh Lanta National Park (Koh Mu National Park) to access the islands.
The sea can be choppy, so those prone to seasickness should plan ahead.
Divers should avoid going into any of the caves when there are strong surges.
Koh Haa is only accessible by boat. The closest access point is Koh Lanta, around 45 minutes away by speedboat (and a few hours by larger dive boats). Boat tours are also available from Koh Phi Phi, and even further, including Krabi and Phuket, more than 50 miles away.
The best time to visit Koh Haa is during the high season from November through March, when the waters are calmer and you’re most likely to see whale sharks. With more than a dozen dive sites, divers can easily spend a few days here on a live aboard, though day trips are easy and plentiful. Ko Haa is typically closed over the monsoon season, from May through October.
With visibility up to 100 feet (30 meters) and depths between 10 feet (3 meters) and 115 feet (35 meters), Koh Haa offers fantastic diving for all levels of experience. The shallow lagoon is suitable for beginners on a Discover Scuba experience or open water divers, while the caves of The Twin Cathedral are best for advanced divers, especially those with cave certification. In between are walls, drop-offs, pinnacles, and swim-throughs.