Koh Haa Yai is the most southerly of the Koh Haa islands and it's also the largest of this group of islands. Often mistakenly called Koh Haa Five, many divers love to visit the three large caverns on the south west of Koh Haa Yai. Two of the caverns are inter-connecting via a large round swim-through and the largest is often referred to as The Cathedral.
The Cathedral is easily accessed through an opening from 6 to 13 meters, and with natural daylight inside, divers can surface inside the Cathedral and witness the breathtaking view above and around. Ancient stalactites drop from the high ceilings and natural light filters through from the waters below, giving The Cathedral caverns a magical effect.
Continuing around Koh Haa Yai with the reef on the left, divers can find numerous species including, harlequin shrimps, leafy ghost pipefish, gorgonian sea fans, spiny lobsters in cracks and, if you are lucky, you may even spot a whale shark cruising past on the western side. During April there is also the chance to see whales at Koh Haa Yai as they pass by on their annual migration.
The route from The Cathedral round to the west of Koh Haa Yai is a very interesting alternative, but seldom dived area (reef on the right shoulder). This route leads divers along a sloping, coral encrusted reef with usually excellent visibility and a lot of marine life. Coral conditoin is excellent, with several rocky outcrops and deeper bommies home to soft corals and gorgonian sea fans as you descend along the reef slope. Eventually the sloping reef leads around to the ridge connecting to Koh Haa Five (Lek) often called The Secret Garden.
The shallow coral garden in front of the beach on Koh Haa Yai is a must see for snorkelers and great for beginner divers. Lying at around 6 meters, the beach is filled with coal formations which can be several meters high, purple anemone beds with their resident clown fish, and no shallow coral garden would be complete without its angelfish, rabbitfish, grouper, snapper, wrasse, banner fish, moorish idols and colourful parrot fish. Turtles, octopus, squid and cuttlefish are also often spotted here.
See our High Season Trip Schedule
High Season trip schedule normally operates between October 15 and May 14.
We love to dive as much as possible, however all our trips depend on the weather, sea conditions, currents and minimum numbers and may be subject to change at short notice.
We may schedule a Shark Point & Anemone Reef trip or a KledKaeo Wreck trip on Saturdays, upon request, minimum 4 divers required - please let us know if you are interested.