Best Time to Visit
March to September (calm seas, 28-32°C, best diving visibility 20-40m). October-December has monsoon swells. Whale shark season: March-April
Language
Thai; English widely spoken due to dive tourism
Currency
Thai Baht (THB)
Time Zone
ICT (UTC+7)
Airport
Koh Samui Airport (USM), then 1.5-hour ferry; or Surat Thani (URT) and 5-hour ferry/bus combo
Population
~2,000 permanent residents; swells to 10,000+ with tourists and dive staff
Climate
Tropical, avg 27-32°C year-round, wettest October-December
Safety Rating
Generally Safe (Level 1) — exercise caution with motorbikes and late-night activities
Koh Tao's premier dive site — a granite pinnacle rising from 40m depth to 15m above the surface, midway between Koh Tao and Koh Phangan. Famous for its vertical swim-through chimney, schooling barracuda, batfish, and whale shark sightings (March-May). Boat trip: 1,200-1,800 THB (~$34-50) for two dives. Advanced Open Water recommended. Visibility routinely exceeds 20m. Book a day in advance during peak season.
A picturesque east-coast bay framed by giant granite boulders with excellent shore snorkeling among coral gardens and blacktip reef sharks. Free beach access. Snorkel gear rental: 150-200 THB (~$4-5.60). The cliff jumping rock on the south side is popular (3-5m drops into deep water). A treehouse bar perched on the rocks serves cocktails with a view. Best snorkeling: morning before waves pick up.
Koh Tao is the cheapest place in the world to get PADI certified — Open Water courses run 8,500-10,000 THB (~$240-280) for 3-4 days including all dives, gear, materials, and often free accommodation. Over 70 dive shops compete for your business. Top-rated shops: Crystal Dive, Big Blue, Ban's Diving. Book directly for best prices. The warm, calm waters and shallow sites make it ideal for beginners.
A moderately challenging 30-minute hike from Chalok Baan Kao Bay to a panoramic viewpoint overlooking both Shark Bay and the southern coastline. Entry: 50 THB (~$1.40). The trail winds through boulders and jungle — wear proper shoes (not flip-flops). Early morning or late afternoon for best light and cooler temperatures. On clear days you can see Koh Phangan to the south.
A sheltered bay on the south coast where juvenile blacktip reef sharks patrol the shallows — you can spot them from the beach. Entry: 100 THB (~$2.80). Snorkeling here is excellent with healthy coral and sea turtles feeding on seagrass. Best viewed at low tide when sharks come closer to shore. The bay is also a nesting area for hawksbill turtles. Respectful distance is mandatory.
The highest accessible viewpoint on Koh Tao with a 360-degree panorama of the island, surrounding sea, and neighboring islands. Reach it by a steep dirt road (4x4 or walk — regular scooters struggle). Entry: 100 THB includes a mango smoothie at the top. Open 9AM-5:30PM. The road is the adventure — seriously steep and rutted. Walk if your scooter skills aren't expert level.
Ferry from Koh Samui or Surat Thani to the dive capital of Southeast Asia.
Lomprayah catamaran from Koh Samui(1.5 hours)
THB 600 one-way. Or night ferry from Surat Thani (8h, THB 600 with bunk). Lomprayah.com for schedules
Check-in on Sairee Beach(30 minutes)
The main strip. In Touch Resort (THB 800-2,000). Budget: hostels from THB 300. Many dive schools offer free accommodation with courses
Lunch at Barracuda Restaurant(1 hour)
Sairee Beach. Thai set lunch THB 120. The green curry is excellent. Sea views from the terrace
Sairee Beach sunset walk(1.5 hours)
1.7km of sand with beach bars every 50 meters. Walk the full length as the sun drops. Grab a cold Chang from a beachfront bar (THB 80)
Start the world's cheapest PADI certification, or join a snorkeling tour if already certified.
PADI Open Water course Day 1 at Crystal Dive(6 hours)
THB 8,500-10,000 for full 3-4 day course. Day 1: theory, pool session, confined water skills. Crystal Dive, Big Blue, and Ban's Diving are top-rated. Book directly for best prices. Free accommodation often included
Alternative: Full-day snorkeling tour(6 hours)
THB 700-1,000. Visit 5 sites including Shark Bay, Japanese Gardens, and Hin Wong Bay. Includes lunch, gear, and guide
Dinner at The Gallery Restaurant(1.5 hours)
Upscale Thai-fusion on Sairee. Massaman duck curry THB 280. Candlelit beachfront dining. Book for sunset
First open water dives, or explore Koh Tao's most beautiful bay.
PADI Open Water Day 2(6 hours)
First open water dives at shallow sites (6-12m). See your first reef underwater — clownfish, parrotfish, and maybe a turtle. The warm, clear water makes everything easier
Alternative: Tanote Bay(4 hours)
Motorbike to the east coast (THB 200/day rental — careful, roads are steep). Tanote Bay: granite boulders, excellent shore snorkeling, cliff jumping (3-5m). Snorkel gear THB 150-200. Blacktip reef sharks common. The treehouse bar on the rocks serves cocktails with a view
Evening at Fizz Beachlounge(2 hours)
Sairee's popular bar. Fire show at 10PM most nights. Cocktails THB 180
Panoramic hike and snorkeling with blacktip reef sharks and sea turtles.
John-Suwan Viewpoint hike(1.5 hours)
From Chalok Baan Kao Bay. THB 50 entry. 30-minute moderate hike through boulders and jungle. Panoramic views of Shark Bay and the southern coastline. Proper shoes needed
Shark Bay (Thian Og Bay)(2 hours)
THB 100 entry. Juvenile blacktip reef sharks patrol the shallows — spot them from the beach. Sea turtles feed on seagrass. Best at low tide. Snorkeling is excellent. Respectful distance mandatory
Lunch at Viewpoint Restaurant, Chalok(1 hour)
Simple Thai food with bay views. Pad krapow THB 100
Chalok Baan Kao sunset(1.5 hours)
Koh Tao's most peaceful bay for sunset. Less hectic than Sairee. New Heaven dive bar has a chilled vibe
Final dives and certification, or conquer Koh Tao's highest viewpoint.
PADI completion dives(5 hours)
Final skills assessment and fun dives. Congratulations — you're a certified diver. The warm-water certification stays with you forever
Alternative: Mango Viewpoint(2 hours)
THB 100 entry (includes mango smoothie). Koh Tao's highest viewpoint. 360° panorama. The road is seriously steep — walk if scooter skills aren't expert. Open 9AM-5:30PM
Celebration dinner at Whitening Bar(1.5 hours)
Sairee Beach. Seafood barbecue on the sand THB 350. Live music and fire shows. The PADI celebration tradition
Recover from the dive course with a slow day.
Morning at Sairee Beach(2 hours)
The northern end is quieter. Swim, read, doze
Lunch at Chopper's Bar & Grill(1 hour)
Burgers and milkshakes. The bacon burger (THB 250) is a hangover classic
Afternoon at Aow Leuk Bay(2 hours)
East coast bay with excellent shore snorkeling. THB 100 entry. Coral and fish right from the beach. Less crowded than Tanote
Sunset at Sairee corner bar(1.5 hours)
The rocky point at Sairee's south end. Cocktails on granite boulders watching the sky change
Optional early-morning dive at Koh Tao's premier site, then ferry out.
Optional: Sail Rock dive trip(5 hours)
THB 1,200-1,800 for two dives. Koh Tao's best site — granite pinnacle with vertical chimney swim-through, schooling barracuda, possible whale sharks (March-May). Advanced OW recommended. Departs 6:30AM, returns 11AM
Lomprayah catamaran to Koh Samui or Surat Thani(1.5-2 hours)
THB 600. Afternoon departures available. Book ahead in peak season
60-day visa-free entry for citizens of 57 countries (as of 2024). Koh Tao is part of Surat Thani province — no additional permits needed. If you overstay to finish a dive course, the fine is 500 THB/day payable at the airport. Immigration occasionally does spot checks on the island.
From Koh Samui: Lomprayah catamaran (1.5h, 600 THB / ~$17) or Seatran Discovery (1.5h, similar price). From Surat Thani (mainland): night ferry (8h, 600 THB, includes bunk) or Lomprayah bus+catamaran combo (5h, 1,050 THB / ~$30). From Bangkok: joint bus+ferry tickets from Khao San Road agencies (12-14h, 900-1,200 THB). Book Lomprayah at lomprayah.com for guaranteed schedules.
Most dive schools offer free or heavily discounted accommodation if you book a course with them. An Open Water course (8,500-10,000 THB) with 3 nights free accommodation is a better deal than paying separately. Compare shops in person on Sairee Beach. Food on Koh Tao is pricier than the mainland — expect 80-150 THB for Thai food, 200-350 THB at Western restaurants.
Koh Tao's roads are notoriously steep, unpaved in parts, and poorly lit. Multiple tourist injuries occur daily. The road to Tanote Bay and Mango Viewpoint are the worst — near-vertical in places. Scooter rental is 200-300 THB/day but your insurance almost certainly won't cover an accident. Walk or hire a longtail boat to remote beaches instead.
Koh Tao has a documented problem with drink spiking at some bars, particularly on Sairee Beach. Never leave drinks unattended, always watch your drink being poured, and go out with friends. Avoid accepting free drinks from strangers. If you feel suddenly intoxicated beyond what you've consumed, seek help immediately. The island's hospital is basic — serious cases are transferred to Koh Samui.
Koh Tao's reefs are under pressure from tourism. Use reef-safe sunscreen (no oxybenzone or octinoxate) — many dive shops sell it. Don't touch, stand on, or take coral. The island's marine conservation programs (like the New Heaven Reef Conservation Program) welcome volunteers for reef restoration if you're staying longer than a week.
StoriesA Thai dive instructor who's logged 5,000+ dives shares what the reefs look like from underwater, which dive shops to trust, and the one thing tourists do that damages coral for decades.
Travel GuidesEverything you need to know about Thailand's dive capital — from choosing a PADI school to the best viewpoint hikes and the street food worth crossing the island for.
SeasonalMarch and April bring the world's largest fish to Sail Rock. Here's how to maximize your chances — and what else makes the season extraordinary.
