Gulf of Thailand (Chumphon Archipelago)
Koh Tao
The Gulf island where most UK travellers learn to dive: how to actually get there with no airport, what a PADI Open Water course really costs, and why you book the island by the calendar — not the photo.
In short
Koh Tao at a glance
Koh Tao is the small Gulf island where a huge share of the world's new scuba divers get certified, mostly because it is one of the cheapest and most sociable places on earth to do a PADI Open Water course — roughly ฿9,000–11,000 (~£200–260) for the three-to-four-day qualification, sleeping accommodation often thrown in. There is no airport, so getting here is a flight-plus-ferry exercise: most people fly to Koh Samui or Surat Thani, or take the overnight train and bus to Chumphon, then a high-speed catamaran across. The island runs on the Gulf calendar, opposite the Andaman side — February to August is the dry, calm, good-visibility window, while October to December brings the heaviest rain and the roughest crossings. Most visitors stay two to four nights; divers stay a week.
Koh Tao is barely 21 square kilometres of granite, jungle and beach, but it punches far above its size because it is, by a distance, the place most new divers in the world get their first qualification. The reason is simple economics: dozens of dive schools packed onto one small island compete on price, so a PADI Open Water course costs a fraction of what you’d pay in the Red Sea or the Caribbean, and there’s a built-in crowd of people doing exactly the same thing. That gives the island its character — young, sociable, scuffed-up and cheap — which is the thing to get straight before you book. If you’re picturing the manicured resort version of Thailand, you want Koh Samui next door; Koh Tao is the scrappier, more fun one.
The mistake first-timers make is logistical. There is no airport, and the island runs on the Gulf’s weather, not the Andaman’s — so people who book a flawless October beach week off a photo arrive to grey seas, cancelled ferries and poor underwater visibility, while the same week is glorious on Phuket. Get those two things right — a through-ticketed flight-and-ferry route, and a February-to-August visit — and the rest looks after itself. Don’t over-schedule it either: the island rewards a slow few days of diving, one boat trip to Koh Nang Yuan and a viewpoint hike, not a packed itinerary.
The route
The first-timer's mistake is treating Koh Tao as a quick beach stop the way you'd do Koh Samui — it isn't, because half the point is the diving and the other half is the boat day to Koh Nang Yuan. This is a relaxed three-to-four-night skeleton built around a learn-to-dive course or a couple of fun dives; ferry times are the published high-speed catamaran schedules, which run to the Gulf calendar and thin out in the October–December monsoon.
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Day 1
Arrive and settle on Sairee
Most arrivals come in by ferry to Mae Haad pier — about 1h45 by Lomprayah catamaran from Chumphon, or roughly 1h30–2h from Koh Samui. Walk or take a songthaew (~฿100–200) the short hop to Sairee Beach, sign up with a dive school if you're learning, and watch the sunset from the long beach bar strip.
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Days 2–3
Learn to dive (or fun-dive)
The PADI Open Water course runs over three to four days for ~฿9,000–11,000 (~£200–260), with classroom, pool and four open-water dives; certified divers do two-tank fun dives at sites like Chumphon Pinnacle or Shark Bay for ~฿1,800–2,500 a trip. Non-divers can swap this for snorkelling and the island's viewpoints.
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Day 4
Koh Nang Yuan and the viewpoints
Take a longtail or join a snorkel boat to Koh Nang Yuan, the linked-sandbar islet off the northwest coast — there's a ฿100 landing fee and a short, steep climb to its famous viewpoint. Back on Koh Tao, hike or scooter up to the John-Suwan viewpoint above Chalok before catching an afternoon ferry out.
Where to base yourself
Pick one or two bases rather than moving every night.
Sairee Beach
£ valueThe island's main hub: a long sweep of sand backed by dive schools, hostels, bars and beach restaurants. Liveliest and most convenient for first-timers and learner divers, but the northern bar strip is loud at night — pick a set-back guesthouse if you want sleep.
Best for: First-timers, learning to dive, nightlife
Chalok Baan Kao
££ mid-rangeA quieter southern bay with a more laid-back, less party-led feel and easy access to the John-Suwan viewpoint and Shark Bay snorkelling. A short scooter or songthaew ride from Sairee's bars, so it's the calmer base that's still close to everything.
Best for: Quiet, couples, snorkelling
Mae Haad
£ valueThe pier village where the ferries land, with banks, the 7-Elevens, dive shops and cheap eats. Handy if you're arriving late or leaving early and want to be steps from the boat, though it's a working port rather than a beach base.
Best for: Early ferries, convenience, dive-shop access
Getting around Koh Tao
Koh Tao is small and there's no public bus, so getting around is on foot, by songthaew shared truck-taxi or by scooter. Songthaews from Mae Haad pier to Sairee or Chalok are about ฿100–200 a person (more at night or for one passenger), and dive schools usually run free pick-ups for course students. Scooter hire is cheap at around ฿200–300 a day, but the island's hills are steep, the roads are rough and unsealed in places, and rental scams over 'pre-existing' scratches are a known problem — photograph the bike before you ride and be aware that Thailand's road-accident rate is one of the world's highest, so think hard before renting. To reach Koh Nang Yuan or the offshore dive and snorkel sites you take a longtail or a dive-school boat; there is no road link to it.
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