A selective guide to scuba diving in Mu Ko Ang Thong — where to go, what to see, and how to get there. Updated March 2026.
Mu Ko Ang Thong National Marine Park offers a different experience compared to the deep-water pinnacle dives of Koh Tao. Here, you'll find shallower coral gardens (10–25m), dramatic limestone overhangs, and sea caves. It is particularly famous for its soft corals and large schools of snapper and barracuda.
While visibility is generally lower than Koh Tao (averaging 5–15m), the sheer volume of macro life and the lack of crowds make it a favorite for photographers and experienced divers looking for something unique.
Look for nudibranchs, seahorses, and pipefish amongst the anemones and soft corals at Koh Yippon.
Most dive boats visit Koh Yippon or Koh Wao — the northernmost islands in the park.
Famous for sea caves and swim-throughs at 8–18m. Home to banded sea snakes, stingrays, and massive carpets of sea anemones.
A sheltered bay ideal for beginners and refresher dives. Great hard coral formations and a high chance of seeing whale sharks in the right season.
Dramatic rock formations and shallow reefs. Excellent for shallow-water exploration and colourful reef fish.
Unlike standard sightseeing tours, dive boats depart earlier and spend more time at sea.
Dive boats leave Koh Samui or Koh Tao early to reach the northern sites before the crowds.
Explore the swim-throughs and soft coral gardens.
Served on the boat during the surface interval.
A shallow second dive focused on biodiversity and marine life spotting.
Diving requires a 90-120 minute boat ride from Samui. If you're prone to motion sickness, take a tablet 30 mins before boarding.
Visibility and water temperature change throughout the year.
The best visibility (up to 20m) and the highest chance of Whale Shark sightings.
Warm water (29-30°C) and calm seas, though visibility can drop slightly.
Monsoon season. Heavy rains and currents reduce visibility to 2-3m. Many dive shops close.
Compare the top dive-inclusive tours from Koh Samui and Koh Tao. Fully refundable bookings available.