Sixteen Metres Down: Learning to Freedive in Koh Tao

I should tell you something before this story makes sense: I had a thing about holding my breath underwater. Not casual nervousness — a real, body-deep fear, because I'd once had a near-drowning experience. The kind that rewires you. And then I went to Koh Tao and became the first person in my group to drop into the deep.

How to get to Koh Tao (the island built for diving)

Koh Tao is a small island in the Gulf of Thailand and one of the great diving and freediving capitals of the world. The one thing you must plan around: there is no airport. No buses, no trains, no flights. The only way in is by boat — and honestly, that little bit of friction is part of why the island still feels the way it does.

• From Bangkok: a combined bus + ferry ticket (Lomprayah, Boonsiri) to Chumphon pier, then a catamaran — about 1h45 to Koh Tao's Mae Haad pier.
• From Koh Samui (which has an airport): high-speed ferries several times daily. Fly to Samui, then ferry over — the easy option.
• Also reachable from Koh Phangan, Surat Thani and Chumphon.

Here's something I didn't expect: the island is full of foreigners, and a huge number of them have come alone. Solo travellers from everywhere, all washed up on the same little dive island — which means it has this instant, easy sense of community. You arrive by yourself and within a day you've got a crew: people from your course, people from the next guesthouse over, everyone slightly obsessed with the water. You're never actually alone here unless you want to be.

Freediving courses in Koh Tao: what to expect

You'd think someone with a near-drowning in their past would pick any other activity. But that was the point — I was tired of the fear owning me. Freediving is just you, your body, your breath, and the water. The most direct way to face it.

Koh Tao is one of the best places on earth to do it, saturated with certified schools under AIDA, PADI, and SSI. A beginner course typically runs 2–3 days, usually around 7,000–8,000 Thai baht including manual, equipment and certification. Beginners commonly aim for somewhere in the 10–16 metre range (constant weight) — though it's a goal, not a guarantee: AIDA 2, for instance, certifies from a 12-metre minimum, and how deep you actually get usually comes down to equalizing your ears, not to fitness. And the whole culture is built on safety: you always dive with a buddy/instructor — nobody serious freedives alone — and learning your own limits is the core of the course.

The dive that changed everything

So there I was. First in my group. Heart hammering — not from excitement, from that old fear. I took my breath. I turned head-down. I started to descend. And the water opened — because I sank straight into the middle of an enormous school of fish, a shimmering cloud of them parting and re-forming around my body. So absurdly cinematic I forgot to be afraid.

My instructor descended right alongside me — that's how it works, you're never alone — keeping me calm the whole way. I was so wrapped up in the fish and his steadiness that I lost track of how deep I was going. When I finally registered it, I'd hit sixteen metres. Me — the same person who, not long before, couldn't make peace with holding her breath underwater at all.

Then the fear came back for one sharp moment: I'm out of breath, I need to get up. I flipped so my head pointed up to begin the ascent... and the strangest, most beautiful thing happened. The instant I turned upward, the urge to breathe just — vanished. And here's the thing they teach you, the thing that changed how I understand my own body: that desperate urge to breathe isn't your body running out of oxygen. It's just rising CO₂ setting off an alarm — when you feel it, your blood still holds plenty of oxygen left to use. You don't actually need to breathe yet. It's almost entirely a matter of calming your mind. In that sudden quiet I realised I could have stayed down even longer. The panic had been in my head, not my lungs. The fear had been lying to me the whole time.

I came up slow, broke the surface, and I was a different person than the one who'd gone down ninety seconds earlier.

One crucial safety note, because this matters: "you don't need to breathe yet" is only true early in a calm, supervised dive — it is never permission to push past your limits. The flip side of that physiology is dangerous: hyperventilating before a dive (over-breathing to "feel ready") suppresses the CO₂ that warns you, so the urge to breathe arrives only when your oxygen is already critically low — and a freediving blackout can hit with no warning at all. It's the leading cause of freediving deaths, and it's exactly why this is something you learn properly, in a course, with an instructor. Never hyperventilate, never push your limits, and never, ever freedive alone.

A good freediving course isn't about pushing you deep — it's about teaching you to breathe, relax, read your own signals, and trust a system and a buddy. The depth is almost a byproduct. The real lesson is control. If you have a real fear of the water, like I did — tell your school. The good ones specialise in exactly that.

Planning a freediving trip to Koh Tao

• Get to the Gulf: fly into Bangkok or Koh Samui.
• Take the boat: bus+ferry from Bangkok via Chumphon, or a straightforward ferry from Samui.
• Pick a certified school: AIDA, SSI or PADI; read recent reviews; tell them if you're nervous.
• Budget 2–3 days for the beginner course (~7,000–8,000 baht) and don't over-schedule.
• Stay a little longer — Koh Tao is gorgeous above the water too.

Why you should do this

Here's what I'd tell you quietly: Koh Tao is the rare place where you can take one of the most intimidating things imaginable — sinking into the deep on a single breath — and learn it safely, affordably, and beautifully, from world-class instructors, in warm, fish-filled water, over a long weekend. You don't need to be an athlete. You don't need to be fearless. I was the opposite of fearless — I'd had a near-drowning that genuinely scared me off the water. And I still dropped sixteen metres into a wall of silver fish and came up changed. If there's a fear you've been carrying around in your chest, the water off Koh Tao is a very good place to set it down. Go take the breath.

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