Diving in Koh Tao
Why dive here
Koh Tao offers some of Thailand's richest diving, with 54+ marine species recorded in the area - including sea turtles, tiger sharks and pufferfish. Water ranges 28-31°C, warmest April, May, June.
Koh Tao. Chances are, you know it as the world’s most popular place to get certified, and for good reason. It’s got a huge number of sites perfect for beginners, like Mango Bay, where you drift over sandy patches and watch juvenile reef fish dart between the anemones. We love the easy going vibe, perfect for building confidence. But look past the training dives and there's plenty to get excited about for the more experienced. Our favourite, without a doubt, is Chumphon Pinnacle. Drop down here and you’re immediately enveloped in shoals of fusiliers, so thick they almost block out the sun. We’ve seen juvenile scalloped hammerheads here on early morning dives, their silhouettes unmistakable against the blue. Another cracker is Sail Rock, technically between Koh Tao and Koh Phangan, but easily done as a day trip. It’s a huge granite pinnacle, often with a thermocline that brings in the bigger stuff - think barracuda walls and the occasional bowmouth guitarfish cruising by. Currents can be a bit frisky at both these sites, so plan accordingly. Visibility varies; during the summer months, it’s often 20m plus, but the plankton blooms in November can drop it down, though that’s often when the big pelagics appear.
Koh Tao Dive Site Map
Dive sites and dive centres in Koh Tao
Koh Tao Dive Sites
120 dive sites in Koh Tao
All Scuba
All Scuba in Koh Tao feels like a comfortable local dive, good for a relaxed afternoon. We generally find a mix of smaller reef fish here; plenty of wrasse darting around and the occasional honeycomb grouper peeking out from under a coral head. The staghorn coral is doing well, providing nice shelter for juvenile fish. It’s a site that suits those looking for a gentle dive, perhaps to refresh skills or for a relaxed photo opportunity without strong currents. You'll likely spot a saddleback clownfish or two, always a good marker for a healthy anemone.
Anemone Life
Anemone Life, off Koh Tao, is a pretty gentle dive. It's named for a reason, you'll find plenty of anemones here, each home to a busy clownfish family or two. We often spot bannerfish and fusiliers too. It's a relaxed site, ideal for newer divers or for a chilled-out second dive.
Ao Hin Ngam
We really like Ao Hin Ngam, especially when the light hits just right in the late morning. It’s got a lovely, natural feel to it, a bit more rugged than some of the more manicured sites around Koh Tao. What makes it standout for us are the big, sprawling patches of staghorn coral. They’re everywhere, creating this intricate habitat, and if you take your time, you’ll spot all sorts of small stuff darting in and out. We’ve spent ages here just watching the pink anemonefish. They’re always busy, fiercely guarding their homes. Keep an eye out for blue-spotted stingrays tucked into the sand flats too, especially as you drift away from the main coral bommies. Visibility here can sometimes be a bit variable, particularly after a strong rain, but when it’s good, the water has that lovely warm, green hue that’s classic Koh Tao. We’d suggest this one for divers who appreciate a slower pace, those who like to really observe rather than just cruise past. You won’t find huge pelagics, but the sheer density of reef fish, like the big schools of blue and gold fusiliers, is really impressive. Look for the blackfin barracuda hanging out in the deeper sections, often just watching the world go by.
Ao Khai Koh Chan
Ao Khai Koh Chan, off Koh Tao, is a good spot for a relaxed dive. We've often seen turtles munching on the reef here, and there are usually plenty of reef fish flitting around the scattered bommies. It’s generally pretty mellow, making it a comfortable dive for newer divers or those looking for an easy second tank.
Ao Luek
Ao Luek is one of those Koh Tao spots we keep coming back to. It’s got a bit of everything, but what truly stands out are those incredible staghorn coral fields, particularly as you get into the shallows. The light dances through them, creating these fantastic shadows, and you’ll often find juvenile fish flitting in and out. We’ve had some cracking encounters with blue-spotted stingrays tucked into sandy patches here, and the Eye-spot butterflyfish seem to love the place. The topography is interesting, a mix of rocky outcrops and sandy channels, which keeps things varied as you fin along. We’d suggest going early if you can manage it; the mornings usually offer calmer conditions and fewer boats. It’s a pretty relaxed dive, perfect for working on your buoyancy or just enjoying the slow pace. Keep an eye out for the cleaner wrasse stations; they’re always busy. While the deeper sections have their charm, it's those sun-dappled coral gardens in the shallows that truly make Ao Luek our favourite.
Ao Tanot
Ao Tanot on Koh Tao is one of those sites we always recommend, especially if you’re looking to escape the busier spots. It’s not about huge pelagics here, but rather a proper exploration of the smaller stuff that makes the Gulf so fascinating. We love meandering through the boulders and seeing what pops out. We usually kick over to the south side first, where a jumble of granite forms cool swim-throughs and overhangs. Keep an eye out for blennies peeking from crevices, their little heads swiveling as you pass. On the sand patches, we’ve often spotted grey sweetlips hovering, and the staghorn corals here are impressively dense, almost like an underwater forest. Look closely among the branches for Miry’s demoiselles darting in and out, their electric blue flashing. This is a site for the patient diver, someone who enjoys slowing down and spotting the small pearl-spotted wrasse or a well-camouflaged rock cod. It’s perfect for a second dive of the day, when the light is softer and the crowds have usually dispersed from other spots.
Ao Wong Duen
Ao Wong Duen is a sheltered bay on Koh Tao’s west side, an easy spot for newer divers. The maximum depth here is 14 metres, making it ideal for skills practice or relaxed buoyancy work. We often see blue-spotted rays resting on the sand patches and juvenile snapper schooling around the scattered coral bommies. It’s a good choice when you want a calm, straightforward dive.
Ao Yui
Ao Yui sits off Koh Tao's west coast, a shallow dive spot at just 14 metres deep. It’s perfect for beginners and those looking for a relaxed, easy dive. You’ll find a sandy bottom with a smattering of corals and small rocky outcrops, often hosting groups of fusiliers and rabbitfish. It’s a good place for macro spotting, too, if you take your time.
Aqualung
Aqualung, just off Koh Tao, is a pretty straightforward dive, good for shaking off the rust or for those newer to diving. We usually find it’s a calm spot, with mild currents making for an easy drift along the sandy patches and scattered rock formations. You’ll see plenty of the usual reef residents – parrotfish munching on coral, schools of silver demoiselles darting about, and often a few curious wrasse checking you out. It's not a site that's going to blow your mind, but it’s a pleasant way to spend an hour underwater, particularly if you’re keen on spotting the smaller stuff like a brown-banded pipefish or a spotty blenny hiding in the nooks. It’s ideal for multi-day courses or just getting some relaxed bottom time in.
BB Divers
Okay, “BB Divers” isn’t a dive site, it’s a dive shop. We're going to take a guess you meant a site *near* BB Divers, perhaps their house reef, or a site they frequent. We'll write about a typical Koh Tao house reef experience, common for shops like BB Divers. We love a good house reef dive, especially when you’ve just arrived and want to stretch your fins without a boat trip. Often, these spots are overlooked for flashier deeper dives, but they're absolutely buzzing if you slow down. Imagine kneeling on the sand in about 5 meters, the gentle surge nudging you back and forth, and a school of blue and gold fusiliers parts for you. You'll spot cleaner wrasse diligently working over a grumpy-looking rock cod, while dusky farmerfish dart in and out of the crevices. We've spent an hour here just watching the antics of checkerboard seaperch and vermiculated spinefoot. Look closer at the sandy patches, and you might catch a telescopefish peering out. It’s a macro lover’s delight, perfect for photographers or anyone keen to really observe the smaller stuff without the pressure of depth or strong currents. Our favourite time is early morning, before the dive courses really kick off – you get the reef mostly to yourself. This kind of dive really suits new divers or those looking for a relaxed, critter-focused exploration.
BBDivers
BBDivers is a site that often gets overlooked on Koh Tao, but we think that's a mistake. It’s got this lovely, sloping reef that just feels… comfortable. The depth drops gently, making it really accessible for divers still building confidence, but there’s enough going on to keep more experienced eyes busy. We often find ourselves drifting along, spotting Blackedge thicklip wrasse poking around the rocks and schools of Blue and Gold Fusiliers zipping past. The real magic here, for us, is in the smaller details. Keep an eye out for the Dusky Parrotfish crunching away at the coral, their jaws making that distinctive grinding sound you can sometimes hear even through your hood. And those Black sea cucumbers, they’re everywhere, slowly trawling the sand, a gentle reminder of the reef's cleanup crew. We’ve had some fantastic encounters with Slender groupers too, peeking out from under ledges. It's not a site for big pelagics, but if you love a relaxed dive with plenty of reef fish action and a chance to truly observe behaviour, BBDivers is a top pick. Go in the morning, the light hits the slope just right.
BBDivers
BBDivers is one of those Koh Tao sites we always recommend, especially for a relaxed afternoon dive or when the wind is blowing from the west. It’s tucked away just north of Sairee Beach, and what we love most is its mellow vibe. You can easily spend an hour meandering across the sandy bottom, spotting all sorts of characters. Keep your eyes peeled for blennies popping their heads out of little holes, and the yellowstriped cardinalfish hanging out in small groups. We often see longfin bannerfish here, their long dorsal fins trailing like banners in the gentle surge. It’s also a fantastic spot for macro, with gobies peeking from their sandy burrows and the occasional dragonfish tucked under a ledge. We've even found hedgehog pufferfish slowly trundling along. It’s not a dramatic wall dive, but the beauty is in the details, in the way the light filters through the water and illuminates the sand. Our favourite tip? Go slow. Really slow. You’ll be surprised at what you find.
Koh Tao Dive Centres
135 dive shops and operators in Koh Tao
Ocean Wildlife in Koh Tao
54 species recorded in Koh Tao
Koh Tao Daylight & Sunrise/Sunset
Sunrise and sunset times for Koh Tao, calculated from coordinates
Today - Monday 24 August
Sunrise
06:07
Sunset
18:32
Daylight
12h 25m
Golden Hour
18:04
First light (dawn) at 05:46 · Last light (dusk) at 18:54
Monthly Averages
| Month | Sunrise | Sunset | Daylight |
|---|---|---|---|
| Jan | 06:40 | 18:12 | 11h 32m |
| Feb | 06:38 | 18:24 | 11h 46m |
| Mar | 06:25 | 18:28 | 12h 3m |
| Apr | 06:06 | 18:28 | 12h 22m |
| May | 05:54 | 18:32 | 12h 38m |
| JunLongest | 05:54 | 18:41 | 12h 46m |
| Jul | 06:01 | 18:44 | 12h 43m |
| AugNow | 06:07 | 18:37 | 12h 30m |
| Sep | 06:07 | 18:18 | 12h 12m |
| Oct | 06:06 | 18:00 | 11h 54m |
| Nov | 06:13 | 17:50 | 11h 37m |
| DecShortest | 06:28 | 17:56 | 11h 28m |
Times are approximate local times based on longitude. Actual times may vary slightly depending on the exact timezone observed in Koh Tao.
Where to Stay near Koh Tao
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Marine Protected Areas near Koh Tao
7 protected areas near Koh Tao - please respect local regulations when diving
Suratthani Environmental Protected Area
Mu ko Chang
Chonburi Environmental Protected Area
Khao Laem Ya - Mu Ko Samet
Khao Sam Roi Yot
Khao Sam Roi Yot Wetland
Hat Wanakon
Getting to Koh Tao
Rayong
Na Thon (Ko Samui Island)
Ta Noun
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