Racha Yai Diving

Today starts with a crackle of anticipation as the alarm sounds in the early morning. We’re all excited about our our family scuba diving tour to Racha Noi and Racha Yai Islands. We have been promised coral gardens, curious marine life and just enough unpredictability to keep things interesting. What we didn’t expect was quite how immersive, energising and, at times, adrenaline-spiking the day would become.

An Early Start

The day begins before the sun has properly stretched itself over the Andaman Sea. At 7am sharp, we are collected from our accommodation near Kamala Beach, still rubbing sleep from our eyes, but buoyed by the promise of the ocean.

Dive days operate on their own tempo. There is no easing into things. You move quickly from land to logistics, from coffee to kit bags, from quiet anticipation to the hum of organised chaos.

The drive south to Chalong Bay takes just under an hour. Phuket wakes around us, street vendors setting up carts, scooters weaving through traffic, monks collecting alms. By the time we collect some of our fellow divers and reach the pier, the day already feels in motion.

Chalong Bay

Chalong Bay is a hive of activity. Dive boats line the pier in varying states of readiness. Some are sleek and modern, others clearly veterans of countless trips to sea. Ours sits somewhere in between: practical, functional and reassuringly well-worn.

If I was expecting luxury, I’m in the wrong place. Dive boats are not designed for lounging; they are built for efficiency. Shoes are removed, tanks clatter into racks, fins and masks are sorted into piles, wetsuits hang in damp clusters. There’s a rhythm to it all, a choreography of preparation that this crew are clearly well versed in.

We’re greeted by our dive instructor, Robbie, whose calm, no-nonsense demeanour immediately steadies my nerves. It has been a while since my last dive, and the idea of slipping back beneath the surface brings a flicker of apprehension.

As the boat pulls away from Chalong Bay, the upper deck fills with divers, some clearly seasoned and silent, others chatty and wide-eyed. The engines roar to life, slicing through the Andaman Sea as Phuket recedes behind us.

Refresher and Rising Anticipation

The journey to our first dive site at Racha Noi takes around 90 minutes, and it’s anything but idle time. Robbie runs me through a refresher: mask clearing, regulator recovery, buoyancy control. It’s equal parts reassuring and humbling. Muscle memory begins to return, but slowly.

Meanwhile, Jasper and Harley lean into the excitement with the ease of youth. They’re already scanning the horizon, peering over the edge of the boat, asking questions about what we might see.

The sea stretches endlessly around us, deep blue and deceptively calm. Occasionally, flying fish skim the surface. The wind whips through the boat, carrying the salty tang of open water. Dive boats, I realise, are their own microcosm. There’s camaraderie here, even among strangers. Shared anticipation creates quick bonds.

Banana Bay, Racha Noi

The call comes to kit up, and everything shifts into focus.

Wetsuits are pulled on. Tanks are strapped. Masks are checked. The deck becomes a flurry of movement, punctuated by the hiss of regulators and the clink of metal.

I won’t pretend I’m calm. Standing at the edge of the boat, looking out over Banana Bay, I feel that familiar flicker of nerves. It’s the moment every diver knows – the one just before you step off.

But Robbie is steady and reassuring. A few final checks, a nod, and then we’re in.

The water is warm, enveloping and I’m finally back below the surface. The noise of the boat disappears instantly, replaced by the quiet, rhythmic sound of breathing.

And just like that, everything settles.

Banana Bay reveals itself gradually. Visibility is good, the reef stretching out in soft undulations of coral and rock.

Jasper is the first to spot something – a moray eel, its head emerging cautiously from a crevice. Harley, not to be outdone, gestures excitedly at a giant puffer fish drifting nearby, its slow, deliberate movements almost comical.

Our guide moves with quiet precision, scanning the reef. She points out a well-hidden lobster tucked deep within the rocks, something we would never have found on our own.

The underwater world feels both vast and intimate. Schools of small fish shimmer around us, shifting direction in perfect unison. Coral formations rise and fall like underwater landscapes.

My nerves fade completely. There’s only the dive now, the steady rhythm of breath, the weightless drift through water.

Lunch on Deck

Back on board, the mood shifts from focused to celebratory.

Gear is shed in a tangle of hoses and neoprene. Towels appear. Conversations spark up instantly – “Did you see the eel?” “That puffer fish was massive!”

Lunch is served buffet-style on deck: traditional Thai dishes that are even more flavorful and satisfying after a dive. Fragrant curries, stir-fried vegetables, rice and fresh herbs.

There’s something about eating at sea that heightens everything. The Thai flavours combine with the sea air and they seem sharper, the appetite stronger.

We sit together, plates balanced precariously as the boat gently rocks. The islands rise in the distance, their green silhouettes cutting against the blue horizon.

Manta Bay, Racha Noi

Re-energised and sun-warmed from lunch, we slip back into dive mode with a little more ease and a lot more confidence. As we prepare for the second dive at Manta Bay, the energy is different. I’m feeling less tentative, more curious.

As the boat achors, the water below appears almost deceptively calm. There’s no dramatic hint of what lies beneath, no surface disturbance, no obvious signs of the life waiting below. But that seems to be the way with diving – and at least part of the attraction – that the real spectacle is hidden, just out of sight.

We step in, one by one. The entry feels easier this time, more fluid, less hesitant. Gear feels more familiar and movements are smoother. A rush of bubbles and brief disorientation giving way to a quiet, suspended stillness.

Underwater

Underwater, the scene shifts noticeably. Manta Bay lives up to its reputation for fish life. Schools of fish teem around coral outcrops, moving in dense, hypnotic formations. The reef is alive with motion. If Banana Bay was a gentle reintroduction, Manta Bay is a full immersion into the pulse of reef life.

The first thing I notice is the density of fish. Not scattered individuals or small clusters, but proper schools – tight, coordinated, constantly shifting. They move like a single organism, rippling and reforming as we pass. Silvers flash in the filtered sunlight, occasionally broken by streaks of yellow or electric blue.

I hover just off the reef, careful with my buoyancy, and simply watch. There’s a hypnotic quality to it. The schools part around us, then close again, as if we were never there.

Jasper is immediately engaged, pointing out species with growing confidence. Harley, meanwhile, seems drawn to the bigger personalities – the fish that move a little slower, a little more deliberately, as though they own the space.

Then comes one of the most distinctive features of this dive – the sound. It’s subtle at first, almost easy to miss beneath the steady rhythm of breathing. But once you notice it, it’s unmistakable: a crunching, scraping noise echoing faintly through the water.

We follow the sound and find them scattered across rocky outcrops, their bright, almost neon colours standing out against the reef. They graze methodically, beak-like mouths scraping algae from coral and stone. Each bite produces that audible crunch, a reminder that the reef isn’t just a visual experience, but a living, working ecosystem. Fragments of coral and sand drift in the water where they feed, part of the natural cycle that shapes these underwater landscapes.

Light and Depth

Manta Bay offers a beautiful interplay of light and depth. Sunbeams pierce the water in shifting columns, illuminating sections of reef while leaving others in soft shadow. As I move through the water, the light changes constantly. At once bright and vivid, then muted and dreamlike.

Drifting slowly along the reef edge, the current is strong enough to carry us without much effort. I relax into the dive a little more, letting go of control and simply following.

Robbie keeps a watchful eye, subtly guiding our path, ensuring we stay together without breaking the sense of freedom. There’s a quiet confidence now. Movements are more fluid. Communication is easier with simple hand signals, shared glances and the occasional wide-eyed gesture when something particularly striking appears.

The longer we stay, the more the layers of the reef reveal themselves. Closer to the coral, smaller fish dart in and out of crevices. They’re quick flashes of colour that disappear almost as soon as you notice them. Above them, mid-sized fish move in loose formations, while the larger species patrol more deliberately along the edges. It’s a vertical world, structured and interconnected.

At one point, we pause near a coral bommie where activity seems especially concentrated. Fish weave through it like traffic through a busy intersection, each species following its own invisible rules. There’s no single focal point. Everywhere you look, something is happening. Time stretches underwater. What feels like minutes is, in reality, much longer.

I find myself slowing down, noticing more. The way the light catches on scales. The subtle movements of coral in the current. The almost imperceptible shifts in direction as entire schools of fish respond to something unseen.

Manta Rays

Despite the name, manta rays remain elusive on this particular dive. There’s always that underlying hope, but the ocean doesn’t perform on demand. And in truth, the absence of manta rays doesn’t diminish the experience. If anything, it sharpens your appreciation for everything else. The reef doesn’t rely on a single headline act, it’s a constant, layered performance.

As our dive time draws to a close, Robbie signals for a gradual ascent. We rise slowly, pausing for our safety stop, suspended in open water. Below us, the reef fades into blue. Above, the surface shimmers with reflected light.

Between Dives

Breaking the surface feels almost abrupt after the calm below.

We climb back onto the boat, shedding gear with a little more efficiency this time. Fresh fruit appears – cool, sweet and revitalising. Watermelon juice runs down wrists, pineapple slices disappear quickly.

We settle into our spots, the sun warming our skin as the boat gently rocks. Manta Bay lingers in the mind, not for a single standout moment, but for its richness, its movement, its sense of being fully alive.

People find their spaces. Some stretch out on benches, others sit cross-legged on the deck, chatting quietly. A few simply stare out at the sea, lost in thought. The crew moves efficiently, preparing for the next site. Tanks are swapped, gear is checked, briefings are given. The boat turns toward Racha Yai Island.

Bay 1, Racha Yai

“Bay 1” might be the least inspiring name imaginable, but it hides one of the most memorable dives of the day.

This is a wreck dive. And not just any wreck, a deliberately sunk vessel, stripped and prepared for safe exploration. Even knowing this, I feel a ripple of unease. There’s something inherently eerie about descending toward a sunken structure. Robbie reassures us. It’s safe. It’s spacious. And it’s designed for divers. Apparently only I am apprehensive.

On approach in the water, the outline of the wreck emerges slowly from the blue, and my pulse quickens. The wreck does seem surprisingly accessible. Open spaces, wide entry points, plenty of light filtering through. Other divers already exploring.

The Wreck

We pose briefly on the bow for photos – an underwater family moment that feels equal parts surreal and exhilarating.

Once inside, the scale is disorienting. Open windows, floors and ceilings create a 3D maze-like structure.

And then, inevitably, I get stuck. My tank clips a window frame. I pause, adjust, try again. It’s awkward, slightly clumsy and although it lasts only a moment, it’s a reminder that underwater navigation takes practice. We move forward, deeper into the wreck.

Just as I begin to relax and feel the wonder of the space and the light, we encounter something unexpected – a wall of jellyfish drifting towards us on the current.

It’s enough to trigger a very immediate, very human reaction.

I panic. There’s no elegance here. I turn and make a direct exit, bumping myself again on the way out in my haste. Not my finest diving moment.

But once outside, breathing steadies and the initial shock fades. I’m a bit rattled and remain cautious, but also curios.

We continue the dive, exploring underwater cubes scattered across the seabed. A moray eel appears again, weaving through the structures. Toward the end of the dive, we encounter a giant jellyfish. Its movements are graceful, almost hypnotic, with a small ecosystem of fish sheltering within its drifting form.

From a distance, it’s extraordinary.

Snacks, Stories and Sunset

Back on board for the final time, the mood is unmistakably relaxed.

Hot chips and sandwiches are served, a simple, satisfying comfort food after a full day of diving. Someone cracks open a beer. Jason & I follow.

The boat turns back toward Chalong Bay, the light softening as the afternoon edges toward evening. Conversations flow easily now. Stories are exchanged, highlights debated, dives logged.

The sea glows under the lowering sun and Phuket gradually reappears on the horizon.

A Day Well Spent

By the time we return to Chalong Bay and transfer back to Kamala Beach, the day feels both long and fleeting.

There’s a post-dive fatigue that settles over us – at once pleasant, grounding and all the better for being earned.

Salt lingers on skin. Hair is wind-tangled. Muscles are pleasantly tired.

It’s the kind of day that stays with you, even after a good, long sleep.

Good to Know

A full-day scuba trip to Racha Noi and Racha Yai is both exhilarating and demanding, so preparation matters. Expect an early start and a structured schedule. Dive trips run on tight timelines to maximise dive opportunities and ensure safe travel between sites. Even if you’re certified, a refresher session is worth embracing, particularly if it has been a while since your last dive.

Dive boats prioritise function over comfort. Seating is basic, space is shared and you’ll spend much of your time moving between gearing up, diving and recovering. Pack light but smart – reef-safe sunscreen, a dry change of clothes and minimal valuables. Seas can vary, so motion sickness tablets are worth considering if you’re unsure.

Marine life is abundant but unpredictable. You may encounter everything from reef fish and eels to jellyfish and larger pelagic species depending on conditions. Always follow your guide’s instructions and maintain good buoyancy control, particularly around coral and within wreck environments.

Finally, bring a sense of humour. Not every dive goes perfectly and sometimes those imperfect moments become the stories you remember most. If you’re lucky, you’ll have a wonderful dive instructor like Robbie to ensure it’s as smooth as possible.

We toured with Phuket Dive Tours. Tours can be booked and paid for online. For questions and support WhatsApp +66 87 022 5356.

Would I Return?

Yes.