Island hopping from Koh Tao.

Three granite islets joined by a narrow white sandbar between two turquoise bays - Koh Tao's single most photographed sight, about a 10-15 minute longtail ride from Mae Haad or Sairee Beach. A short, steep viewpoint hike above the sandbar gives the classic aerial shot; the calm, shallow water on both sides makes for easy snorkeling. Landing here means paying a separate island entrance/maintenance fee in cash on arrival (reported figures vary by source, commonly in the 100-250 THB range - confirm with your boat operator), on top of the taxi-boat fare. A single-use plastic bottle ban is enforced, with reusable bottles sold on the island. Day-trip only: overnight stays are no longer available since the island's former resort operation closed.

Tucked near Chalok Baan Kao on the south coast, this shallow, sandy-bottomed bay is the most reliable place on Koh Tao to spot harmless blacktip reef sharks cruising the shallows, especially in the calmer morning hours or around sunset. It's a standard stop on the island's multi-stop snorkel-boat circuit, and confident swimmers staying near Chalok can sometimes reach it by scooter or on foot rather than by boat.

A sheltered bay on Koh Tao's northwest coast with calm, current-light water and a healthy fringing reef, popular with beginner snorkelers and often paired with Koh Nang Yuan on the same boat run since both sit on the island's north side. Boat-access only - there's no road down to the bay - so it's visited exclusively as a taxi-boat or day-tour stop.

A rockier, quieter bay on Koh Tao's less-developed east coast, reached by longtail taxi, scooter down a steep dirt road, or as a stop on the standard 5-point snorkel circuit. Boulder-strewn shallows hold healthy coral and reef fish with far fewer boats than the west-coast bays, and operators often pair it with Ao Leuk (Leuk Bay) just to the south on the same run.

Nearly every Koh Tao snorkel-boat tour runs a version of the same loop - a full day (roughly 10am-5pm) calling at Koh Nang Yuan, Mango Bay, Hin Wong Bay, Ao Leuk and Shark Bay, with lunch (often on Koh Nang Yuan itself) and an English-speaking guide. It's the easiest way to see most of the island's snorkel highlights in one outing without renting your own boat.

Koh Phangan is a scheduled high-speed ferry connection from Koh Tao (roughly 1-1.5 hours with Lomprayah or Seatran) rather than an established island-hopping day-tour destination - the organized snorkel day trips that link the two islands mostly run the other way, from Koh Phangan to Koh Tao and Nang Yuan. If Koh Phangan is on your itinerary, treat it as a separate stop by ferry rather than expecting a combined boat tour departing Koh Tao.

Ang Thong's 42 limestone islands and hidden lagoon are a genuine highlight of the Gulf of Thailand, but Koh Tao is the least convenient base for reaching them - Koh Samui sits far closer, with day trips there costing roughly 2,000 THB per person. From Koh Tao, a day trip is realistically only possible by private speedboat charter (reported at roughly 40,000 THB or more per boat, split among your group) or a multi-day boat-safari trip run by a couple of local operators. If Ang Thong is a priority, most travellers are better served booking it from Koh Samui or Koh Phangan instead.

Koh Tao's classic wooden longtail is the default way to reach nearby bays independently - a regulated price board at Mae Haad Pier lists fares, typically around 100 THB per person each way to close spots like Koh Nang Yuan or Shark Bay, rising to roughly 150-250 THB for further east-coast bays such as Hin Wong or Tanote. Boats also run directly off Sairee Beach. Good for building your own itinerary rather than joining a fixed circuit.

A larger day-tour boat, sometimes with a shade canopy, that runs the standard 5-stop circuit with a fixed group, guide, lunch and snorkel gear included. This is the boat type behind most of the all-inclusive day-trip prices quoted online, and the easiest way to see several bays in one day without arranging your own transport between them.

Koh Tao's dive shops run daily boats to offshore and nearshore sites, and most will happily take snorkelers alongside certified divers on the same trip - divers head down to the reef while snorkelers explore the surface and shallows at the same site. A practical option if you're staying at a dive resort or travelling with a mix of divers and non-divers, though pricing is usually bundled with the dive shop's own trip rather than sold as a standalone snorkel tour.

Speedboats available for private full- or half-day charter, letting you set your own stops and timing - useful for a custom run around Koh Tao's bays, or the only realistic way to reach further destinations like Ang Thong in a single day. Priced per boat rather than per person, so it becomes more cost-effective as a group splits the cost.

Officially posted at Mae Haad Pier, longtail taxi fares commonly run around 100 THB per person each way to Koh Nang Yuan or Shark Bay, and roughly 150-250 THB each way to further east-coast bays like Hin Wong or Tanote. A private charter of a longtail runs several times the shared per-person rate.

Reported figures vary by source - commonly cited in the 100-250 THB range for the island's entrance/maintenance fee, paid in cash on arrival and not always included in an advertised tour price. Most sources describe this as a local island fee rather than a standard national-park ticket, so confirm the current amount and what's included with your boat operator or tour desk before booking.

Group day tours covering the standard Nang Yuan - Mango Bay - Hin Wong - Ao Leuk - Shark Bay circuit typically run in the region of 500-900 THB per person, usually including hotel pickup, snorkel gear, guide and lunch; smaller-group or premium departures sit toward the top of that range. The Koh Nang Yuan landing fee is generally an extra, separate cash payment.

Joining a dive boat as a snorkeler is usually priced as part of a dive shop's package rather than sold on its own, with day trips bundling try-dives and snorkeling from roughly 3,000 THB per person upward depending on the operator and inclusions - ask your dive shop directly, since pricing and availability for non-diving guests varies shop to shop.

A private speedboat day trip to Ang Thong Marine Park from Koh Tao has been reported at roughly 40,000 THB or more per boat, reflecting the longer distance compared with departing from Koh Samui. Split among a full group it can work out reasonably, but for solo travellers or couples it's rarely cost-effective versus basing the trip from Koh Samui or Koh Phangan instead.

Koh Tao sits in the Gulf of Thailand and follows a different pattern from the Andaman-coast islands like Phuket and Krabi: the calmest seas, clearest visibility and most reliable boat-tour conditions run roughly March through September/October. The reversed northeast monsoon typically arrives late October or November and can bring choppier seas and rain into December or January - the opposite timing from Phuket and Krabi's May-October monsoon. Always check the short-term forecast and with operators around the October-November shoulder season, since conditions can swing week to week.

Mae Haad Pier, right in the island's main town, is the hub for most longtail taxis and day-tour boats. Sairee Beach, just north, also has longtail boats running directly off the sand for guests staying along that stretch. Chalok Baan Kao on the south coast is a convenient departure point for tours and taxis heading to Shark Bay. Confirm your pickup point when booking, since hotel transfer times vary by where you're staying relative to Mae Haad or Sairee.

Book through your resort or guesthouse's tour desk, a dive shop (many run their own snorkel-boat trips alongside diving), a walk-in agent in Mae Haad or Sairee, or online platforms (Klook, GetYourGuide, Viator and similar) that let you compare operators and reviews before paying. Walk-in, same-day bookings are often possible outside peak season, but booking a day ahead is safer in the busier December-April window.

Reef-safe sunscreen (protect the coral you're there to see), a rash guard or light cover-up, a dry bag for phones and cameras, cash in small denominations for the Nang Yuan fee and any extras, and motion-sickness tablets if you're prone to seasickness - open-water crossings to Hin Wong or the east-coast bays can get choppy in a stiff wind.

Don't stand on or touch coral, don't feed or chase the reef sharks at Shark Bay, and pack out any litter. Koh Tao's reefs underpin the island's entire dive-tourism economy, and most operators now brief guests on current reef-safe practices before each trip - listen to your guide's briefing, since rules can be adjusted between visits.

Assuming the Koh Nang Yuan fee is included in your tour price - it usually isn't, so budget separate cash. Skipping reef-safe sunscreen, which some operators enforce and which protects the coral regardless. Underestimating the chop on the Hin Wong/east-coast crossing if you're prone to seasickness. And expecting a same-day Koh Tao-to-Ang Thong round trip on a group-tour budget - from this island it's a private-charter-only route.

Book the earliest available snorkel-boat departure for the calmest water and thinnest crowds at Koh Nang Yuan's viewpoint and sandbar. If you're a certified diver travelling with non-diving companions, ask your dive shop whether snorkelers can join the same boat rather than booking two separate trips. And if Ang Thong is a must-see, build it into a side trip from Koh Samui or Koh Phangan rather than trying to force it into a single day from Koh Tao.

The 5-stop snorkel circuit (Koh Nang Yuan, Mango Bay, Hin Wong Bay, Ao Leuk and Shark Bay) is the classic first-timer choice, since it covers most of the island's snorkeling highlights and the Nang Yuan viewpoint in one full day. If you only have half a day, a longtail taxi straight to Koh Nang Yuan or Shark Bay is the simplest option.

A full-day 5-stop snorkel tour typically runs about 500-900 THB per person, including gear, guide, hotel pickup and lunch. Independent longtail taxis to nearby bays cost roughly 100-250 THB per person each way, and the Koh Nang Yuan landing fee (commonly cited around 100-250 THB) is usually paid separately in cash on arrival.

Yes - unlike the Andaman-coast national parks such as the Similans, Koh Nang Yuan doesn't have an official seasonal closure, though it's a day-visit-only site (no overnight stays since its former resort closed) with opening hours generally around 9:30am-5pm. Rough weather during the October-November monsoon transition can still cancel or delay boat trips, so always confirm on the day.

Koh Phangan is really a ferry destination (about 1-1.5 hours each way) rather than a combined boat-tour stop - most organized snorkel day trips linking the two islands actually run from Koh Phangan to Koh Tao, not the other way round. Ang Thong is reachable from Koh Tao only by private speedboat charter (reported at roughly 40,000 THB or more per boat) or a multi-day boat safari; day trips are far cheaper and easier from Koh Samui or Koh Phangan instead.

Usually not. Most snorkel-boat tours and taxi-boat fares quote a price that excludes Koh Nang Yuan's separate island entrance/maintenance fee, which is paid in cash on arrival - reported figures vary by source (commonly in the 100-250 THB range), so confirm the current amount and whether it's included when you book.

Yes - most Koh Tao dive shops are happy to take snorkelers on the same boat as certified divers, with divers heading down to the reef while snorkelers explore the surface at the same site. It's usually booked and priced through the dive shop's own trip rather than as a separate snorkel-only product.

Roughly March through September/October offers the calmest seas and clearest water, since Koh Tao's Gulf-of-Thailand location means its monsoon pattern runs opposite to Phuket and Krabi's Andaman coast. The reversed monsoon typically settles in from late October or November into December, sometimes January, bringing rougher seas and a higher chance of cancelled or rerouted trips.