Ang Thong Marine Park — Tours Compared, Fees & Is It Worth It

Overview

Ang Thong Marine Park is a chain of 42 limestone islands about 32 km northwest of Koh Samui, and the island’s single most-booked day trip. A day tour costs from 1,200 THB (~34 USD) on a big boat up to around 4,000-5,000 THB (~114-143 USD) on a small VIP speedboat, runs 8-11 hours door-to-door, and centers on two fixed stops: the ~500-step climb to the Wua Talab viewpoint and a visit to the Emerald Lake lagoon on Koh Mae Ko. The park closes for roughly six weeks every monsoon season, so timing matters as much as picking an operator.

This guide compares the five main ways to visit — standard big boat, small-group speedboat, Blue Stars’ kayak-focused tour, 100 Degrees East’s VIP speedboat, and the Red Baron sailing junk — by price, duration, group size and what’s actually included, then walks through the national park fee, the annual closure window, and what a real day on the water looks like from hotel pickup to drop-off.

Key takeaways

• Big boat tours start at 1,200 THB (~34 USD); small-group speedboats run 1,700-2,850 THB (~49-81 USD); Blue Stars’ kayak tour and 100 Degrees East’s VIP speedboat sit at the premium end, 2,800-5,000 THB (~80-143 USD).
• The national park entrance fee is 300 THB (~8.50 USD) for foreign adults and 150 THB (~4.50 USD) for foreign children, charged separately from the tour price by most operators.
• Ang Thong National Marine Park is normally closed to visitors from around 1 November to mid-December each year for monsoon safety and ecosystem recovery — exact reopening dates shift with the weather, so confirm before booking a late-year trip.
• There is no scheduled public ferry to Ang Thong — every visit requires a booked tour or a private charter departing Nathon or Bang Rak pier.
• Every tour includes the same two headline stops (Wua Talab viewpoint, Emerald Lake), so the real choice is boat comfort, group size and how much kayaking or snorkeling time you want.

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Ang Thong Marine Park Tours Compared

Five tour styles cover almost every Ang Thong Marine Park booking from Koh Samui, ranging from a 1,200 THB shared big boat to a 5,000 THB VIP speedboat. The table below compares them on price, duration, group size and inclusions as of Sep 2026.

Big boats are the budget entry point but carry the most passengers and feel crowded at the viewpoint queue and lunch stop. Speedboats cost more but cut crossing time and run in groups small enough to actually talk to your guide. Blue Stars and 100 Degrees East sit at the premium end because their price already bundles the park fee and, in Blue Stars’ case, a second kayaking session most other operators skip. The Red Baron trades some of the water-time for a more comfortable, less crowded sailing-boat experience — it’s the option worth the upcharge if you get seasick easily.

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National Park Entrance Fee and Boat Fees

Ang Thong National Marine Park charges a separate entrance fee on top of any tour price, set by Thailand’s Department of National Parks (DNP) at 300 THB (~8.50 USD) for foreign adults and 150 THB (~4.50 USD) for foreign children under 12. Thai nationals pay a discounted 50 THB (20 THB for children) — bring ID if you qualify.

Boats themselves are also charged a mooring fee — 100 THB per outboard-engine longtail or 300 THB per big slow boat — but this is paid by the operator, not passengers, and only affects tour pricing indirectly. Some operators (Blue Stars, 100 Degrees East) fold the 300 THB park fee into their quoted price; most standard big boat and speedboat operators collect it in cash from each passenger on the morning of departure. Always ask “is the park fee included?” when booking — it’s the most common source of surprise costs on this trip.

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Seasonal Closure — When the Park Shuts Down

Ang Thong Marine Park is normally closed to visitors from around 1 November to mid-December every year, a roughly six-week window during the peak of the Gulf of Thailand monsoon. The closure exists for two reasons: rough seas make the open-water crossing genuinely dangerous on a small boat, and the annual break gives the reefs, beaches and forest trails a chance to recover from a year of daily tour traffic.

The exact reopening date is not fixed to the calendar — park authorities typically confirm it somewhere between 10 and 20 December depending on that year’s weather, and some seasons have seen an earlier closure starting in late October. If your trip falls in late October, November or the first half of December, check with your hotel tour desk or the Ang Thong Marine Park fees and permits page close to your travel date rather than assuming the park is open. Outside the closure window, boats can still be cancelled on short notice for a single rough day — see our best time to visit Koh Samui guide for the calmer December-to-April sailing window.

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What a Day at Ang Thong Actually Looks Like

A typical Ang Thong Marine Park day starts before sunrise and doesn’t end until early evening, with two to three hours of that spent on the water going and coming back rather than at the islands themselves.

• 06:00-07:00 — Hotel pickup by minivan (most operators cover the whole island); Blue Stars’ longer-format tour starts as early as 07:00 at Nathon Pier directly.
• 07:30-08:30 — Board the boat at Nathon or Bang Rak pier, light breakfast served on board, safety briefing and life jacket fitting.
• 08:30-10:00 — Crossing to the archipelago: roughly 45-60 minutes by speedboat or 1-1.5 hours by big boat, weather dependent.
• 10:00-12:00 — First stop, usually Koh Wua Talab: the ~500-step climb to the main viewpoint, then free time to swim or snorkel near the pier before the buffet lunch is served on board.
• 12:30-14:30 — Second stop, typically Koh Mae Ko: the short uphill walk to the Emerald Lake viewpoint, plus a kayaking session in a sheltered bay (a second session on Blue Stars’ longer tour).
• 14:30-16:00 — Final swim or snorkel stop, then the return crossing begins.
• 16:30-18:00 — Arrival back at the departure pier and minivan drop-off at hotels across the island; Blue Stars’ 11-hour format returns closer to 18:00.

The two fixed, non-negotiable stops on every itinerary are the Wua Talab viewpoint climb and the Emerald Lake visit — everything else (extra snorkel stops, a second kayak session, lunch quality, how long you get at each island) varies by operator and is exactly what the tour comparison above is measuring.

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Wua Talab Viewpoint and Emerald Lake — What You Actually Do There

Every Ang Thong tour builds its schedule around two stops: the Ang Thong Wua Talab viewpoint hike and the Ang Thong Emerald Lake at Koh Mae Ko, and knowing what each involves helps you judge your own fitness before booking.

The Wua Talab viewpoint climb covers roughly 500 uneven stone steps up a steep limestone hillside, taking most visitors 30-45 minutes round trip in humid heat with little shade — reef shoes or trainers matter more than sandals here. At the top, the reward is the postcard shot of the archipelago’s islands scattered across the Gulf, the same view used on Thailand tourism material for decades.

The Emerald Lake (Thale Nai) at Koh Mae Ko is a saltwater lagoon sealed inside a collapsed limestone dome, reached by a shorter but still uphill walk from the beach. Swimming inside the lake itself is prohibited to protect the ecosystem, so the stop is a viewpoint and photo opportunity rather than a swim — the kayaking and snorkeling sessions elsewhere in the itinerary cover the water time.

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Big Boat, Speedboat, Kayak or Sailing — Which Tour Should You Book?

The right Ang Thong tour depends more on your tolerance for crowds and boat motion than on budget alone. Budget travelers and larger families do best on a standard big boat: it’s the cheapest option, stable in choppy conditions, and the 50-70 passenger crowd rarely feels oppressive across a full day on multiple islands. Couples and small groups who want a faster crossing and more attentive guiding should pay the premium for a small-group speedboat or 100 Degrees East’s VIP option — you’ll spend less time in transit and more time in the water.

Active travelers who want more than the standard single kayak session should book Blue Stars, whose 11-hour format adds a second paddling stop most competitors skip. Anyone prone to seasickness, or looking for a more special-occasion feel, should consider the Red Baron’s sailing-junk format, which trades some crowd-beating speed for a steadier, more comfortable ride and extra deck space. Whichever tour you choose, our snorkeling guide covers gear and technique tips that apply equally to Ang Thong’s reef stops.

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Is Ang Thong Marine Park Worth It?

Yes — Ang Thong Marine Park is worth the trip for most visitors to Koh Samui, and it remains the island’s most consistently recommended day tour for good reason: nowhere else nearby packs 42 limestone islands, a genuine hike, a swimmable lagoon-adjacent lake and kayaking into a single day for as little as 1,200 THB (~34 USD) plus the 300 THB park fee. The scenery is a legitimate step up from anything visible from Koh Samui’s own beaches.

It’s a weaker fit for anyone who gets seriously seasick on open water, travels with toddlers who can’t manage the viewpoint steps, or has only one flexible day and is visiting during the Nov-mid-Dec closure window — in any of those cases, a shorter half-day trip to Pig Island or a beach day is the better use of limited time. For everyone else, budget the full day, pick a tour tier that matches your crowd tolerance, and book with some flexibility in your schedule in case rough seas push the trip back a day.

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Getting There and Practical Tips

Every Ang Thong tour departs from Nathon Pier or Bang Rak Pier on Koh Samui, with almost all operators including hotel pickup across the island in the tour price — see our ferry piers guide for pier locations if you’re making your own way there. There is no scheduled public ferry to the park; every visit requires a booked group tour or a private charter.

Pack reef shoes or trainers for the viewpoint climb, a reusable water bottle, reef-safe sunscreen, and motion sickness tablets taken about an hour before departure — the open crossing can be choppy outside the December-to-April dry season. Bring cash in small denominations for the park fee if your operator doesn’t include it, and a dry bag or waterproof phone pouch for the kayaking and swim stops. Because the trip runs a full day with real sun exposure, a hat and a change of clothes for the ride home are worth the extra bag space.

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FAQ

How much does an Ang Thong Marine Park tour cost from Koh Samui?

Standard big boat tours start around 1,200 THB (~34 USD) per adult; small-group speedboats run 1,700-2,850 THB (~49-81 USD); premium options like Blue Stars Kayaking and 100 Degrees East cost 2,800-5,000 THB (~80-143 USD). Add the 300 THB (~8.50 USD) national park entrance fee, which many operators charge separately.

Is the Ang Thong Marine Park entrance fee included in the tour price?

It depends on the operator. Blue Stars Kayaking and 100 Degrees East bundle the 300 THB (~8.50 USD) adult fee into their quoted price; most standard big boat and speedboat operators collect it in cash from passengers on the morning of departure. Always confirm before booking to avoid a surprise cost.

When is Ang Thong Marine Park closed?

The park is normally closed from around 1 November to mid-December each year for monsoon safety and ecosystem recovery. The exact reopening date shifts with the weather, typically falling between 10 and 20 December, so confirm current dates before booking a trip in that window.

Can you visit Ang Thong Marine Park without a tour?

No. There is no scheduled public ferry to Ang Thong Marine Park from Koh Samui. Every visit requires a booked group tour departing Nathon or Bang Rak pier, or a private boat charter — independent travel by public transport isn’t possible.

Is Ang Thong Marine Park worth visiting from Koh Samui?

Yes, for most visitors. Ang Thong Marine Park combines a viewpoint hike, a saltwater lagoon and kayaking across 42 islands for as little as 1,200 THB (~34 USD) plus the park fee, and it’s the most scenic day trip near Koh Samui. It suits most fitness levels, though the Wua Talab viewpoint climb involves around 500 steps.

Big boat or speedboat — which is better for Ang Thong?

Big boats are cheaper and more stable in choppy seas but carry 50-70 passengers and feel crowded at the viewpoint and lunch stop. Speedboats cost more (1,700-2,850 THB) but travel in smaller groups of 8-15, cut crossing time roughly in half, and generally include more attentive guiding.