Explore Koh Samui
Koh Samui, nestled in the Surat Thani region of Thailand, is a diver's paradise that offers a unique blend of underwater exploration and tropical island charm. The island's warm, azure waters are home to a vibrant spectrum of marine life, from playful turtles to majestic whale sharks, providing a thrilling experience for divers of all levels. The diverse dive environments include stunning coral reefs, intriguing wrecks, and dramatic walls, all easily accessible by short boat rides.
For those seeking an adventurous dive experience, Koh Samui's proximity to world-class sites like the Ang Thong National Marine Park and the renowned Sail Rock opens up opportunities to witness large schools of fish dancing in the currents. The island's dive centers cater to all skill levels, offering everything from beginner courses to advanced liveaboard trips. With favorable diving conditions from March to September, visitors can expect excellent visibility and minimal currents, ensuring memorable dives. Beyond the waves, the island's idyllic beaches, lush landscapes, and vibrant culture make Koh Samui a holistic destination that promises an unforgettable tropical escape.
Top Dive Sites Map
Diving in Koh Samui
The diving on and around Koh Samui is typical of what you’d expect from many of Thailand’s tropical dive sites - colorful reef diving, shipwrecks, exciting wall diving with dramatic drop-offs and overhangs, and for experienced divers, cave diving is possible with some sites boasting some impressive topography, including swim-throughs and caverns. Drift diving can also be done, however it depends on currents on the day, as they are not always guaranteed.
For amazing topography where you can enjoy caves and swim-throughs in addition to vibrant marine life, visit Koh Yippon and Koh Wao in Ang Thong National Marine Park. Green Rock and Southwest Pinnacles also offer fun swim-through and wall diving opportunities.
Divers hoping for wreck diving can head to the HTMS Sattakut, which is an ex-Thai navy vessel that was sunk to serve as a dive attraction and artificial reef. The vessel is a great spot to undertake a wreck specialty course. It lays on a sandy bottom at around 30 meters, and is approximately 49 meters in length and 7 meters wide.
For amazing reef dives with an abundance of breathtaking marine species, you can be sure to enjoy it all at any of the dive sites in and around Koh Samui, thanks to its perfect location in the tropical Gulf of Thailand.
The best Months to dive in Koh Samui
Diving is good all year round on Koh Samui, though it does experience some seasonal differences. Later December to April is the cooler, dry season, and is thought to be the best time to dive, when air temperatures aren’t too uncomfortably hot, usually lingering between 27°C-30°C (80°F-86°F). Sea temperatures are also just as warm, and tend to fluctuate between the same numbers all year round. Visibility is usually at its clearest, and dive sites tend to experience higher numbers of divers. This period is also the high season, when accommodation and diving may be more expensive that in the low season.
May to September can experience some showers but normally they’re short and brief. Air and ocean temperatures are still hot, and if you want the best chances to encounter whale sharks, March, April and May are the months to visit.
March and April are the hottest months, when temperatures can often reach into the 40s Celsuis (low 100s Fahrenheit). It’s almost non-stop sunshine with no rainfall to break the heat, even at night.
October and November tend to be rainy months, although some sunny days can occur, and diving is still possible thanks to amazing marine life that remains unchanged throughout the year, and a beautifully warm ocean. What’s more, you’re likely to find great deals on accommodation and diving in this period, due to it being the low tourist season, so why not take advantage?
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