Thailand Tourism Update: Ang Thong Closes 1 November

The cool season has arrived, and the first big Thailand tourism update for anyone heading to the Gulf coast is a closing date rather than an opening one. Mu Ko Ang Thong National Marine Park — the 42-island archipelago off Koh Samui that has sold a million screensavers — shuts to visitors on Sunday 1 November 2026 and stays closed for 45 days, with a scheduled reopening on 16 December.

If a boat trip to the emerald lake was pencilled into your week, this changes one day of it, not the trip. Koh Samui, Koh Phangan and Koh Tao all stay open, and there are good alternatives within an hour of Samui's piers. Here is what shuts, what stays open, what it costs, and how to rebuild a Thailand itinerary around it.

What is closing, and for how long

The closure was announced in late September 2026 and covers the whole of Mu Ko Ang Thong: roughly 42 islands across 102 square kilometres of the Gulf, in Surat Thani province. Nothing is half-open. Day tours, private charters, kayaking and snorkelling trips are all suspended, and the park headquarters on Ko Wua Ta Lap — with its camping ground and handful of bungalows — closes too.

The dates are 1 November to 15 December 2026, with the park due back on 16 December. That reopening is conditional: rangers confirm it only once the sea and the weather look settled, so in a rough year it can slip by a few days. If you are booking for the second half of December, choose an operator with free cancellation.

Why Thailand closes its marine parks every year

This is routine, not a crisis, and it is the one Thailand tourism update that repeats on the calendar every autumn. The Department of National Parks closes dozens of sites on a rolling annual schedule timed to each coast's monsoon. On the Andaman side, the Similan and Surin Islands shut from mid-May to mid-October. On the Gulf side the closures land now, when the north-east monsoon pushes swell and squalls across water that small tour boats work in.

The stated reasons are safety and recovery. Six weeks without anchors, fins and a thousand visitors a day lets reefs and nesting beaches reset — the same logic that eventually brought Maya Bay back.

Ang Thong is not alone. The islands of Mu Ko Chumphon, further north on the same coast, close on the same schedule, and on Koh Phangan the Than Sadet waterfall area has historically shut from early October to late December. If one specific waterfall or island is your reason for going, check the park's own page before booking.

What the park costs when it reopens

Worth bookmarking for mid-December, or for next year's Thailand vacation planning:

• Entry fee: 300 baht for foreign adults, 150 baht for children aged 3 to 14; Thai nationals pay 40 and 20 baht. It is usually collected on top of the tour price, not inside it.
• Day tours from Koh Samui: from roughly 1,800 baht a head by speedboat. Big slow boats cost less and ride swell far better.
• Camping on Ko Wua Ta Lap: about 80 baht per person per night, with a three-person tent to rent for around 450 baht.
• Bungalows: roughly 600 baht for a two-person hut, 1,500 baht for one sleeping up to eight.
• Access: licensed operators only — you cannot hire a longtail and go. Samui is about 30 km away, Don Sak pier on the mainland about 25 km.

The two things people come for are Thale Nai, the saltwater lagoon on Ko Mae Ko reached by a 20-minute trail to a cliff-edge viewpoint, and the summit of Ko Wua Ta Lap: a steep 500-metre scramble with ropes, 25 to 30 minutes up, and the view at the top of this page as the payoff.

Where to go instead: Thailand islands that stay open

Samui's operators have run the 1 November switch for years, so the replacement trips are polished — and this is the part of the Thailand tourism update that actually saves your week.

• Koh Tao and Koh Nang Yuan. The classic substitute: three islands joined by a sandbar, the best snorkelling in reach of Samui and a viewpoint every bit as photogenic as Ang Thong's. Around 2,200 baht for a day trip — see our Koh Tao guide.
• Pig Island and Koh Tan. Half an hour off Samui's south coast by speedboat, from about 1,890 baht, with calm snorkelling and the pigs that gave Koh Madsum its nickname.
• Koh Phangan. Thirty minutes by ferry and far more than one party: Bottle Beach, the Than Sadet coast road, a quiet east side. The Full Moon Party runs regardless of the closure; our Koh Phangan guide covers the rest.
• Samui itself. The Na Muang waterfalls, the Big Buddha at Bang Rak, Wat Plai Laem and the Bophut Fisherman's Village night market make a full day of Thai culture and street food with no boat at all — our Koh Samui travel guide has the route.

Getting to Koh Samui

Two ways in, at very different prices. Fly, and Samui's garden-terminal airport takes direct flights from Bangkok, Phuket, Chiang Mai, Singapore, Hong Kong and Kuala Lumpur. Or go the cheap way: fly or take the overnight train to Surat Thani, then a bus to Don Sak pier and the car ferry across — slower by hours, often a fraction of the fare. On the island, songthaews run the ring road for 50 to 100 baht a hop, metered taxis are rare and Grab and Bolt coverage is patchy, so agree a price first.

Building a Thailand itinerary around the closure

This Thailand tourism update is really a nudge about seasons. From November to March the Andaman coast is at its best, which is why so many people travel to Thailand in this window: Krabi, Koh Lanta, Koh Lipe and the Phi Phi islands are open and dry while the Gulf is still clearing its throat. Put Samui at the start of the trip and the Andaman at the end.

On the east coast the cool season is already running. Pattaya is two hours from Bangkok by bus, the list of things to do in Pattaya goes well past the beachfront, and the Koh Larn beaches are a 30-baht ferry from Bali Hai Pier — see our Pattaya and Jomtien guide and the Koh Larn day trip guide. Further east, Koh Kood travel through Trat buys the quietest water on this coast, and November to March is its season.

Bookend it in the capital. Loy Krathong falls on 24 November 2026, the Vijit Chao Phraya river illuminations start on 13 November, and Yaowarat serves the country's best Bangkok street food every night in between — our Bangkok travel guide puts it on one page.

Practical Thailand tourism tips for the closure

• Check the date on any tour you are sold. Some agents still list Ang Thong trips through November. That boat will not sail.
• Book the reopening early. 16 December lands in the run-up to Christmas, and the first boats out go quickly.
• Budget the 300-baht park fee separately. It is rarely in the headline tour price.
• Take a bigger boat if you get seasick. Gulf swell is at its liveliest now.
• Carry cash. Pier kiosks, songthaews and beach kitchens are cash-first.
• Pack a light rain layer. November is the Gulf's wettest month, usually in short heavy bursts rather than all-day grey.
• Confirm with the park, not a blog. Reopening can move by a few days on the weather, and the Department of National Parks publishes the decision.

Forty-five days is not long, and a closed park is a healthier one. If your dates fall inside the window, spend the day on Koh Tao instead — and watch for the next Thailand tourism update on 16 December, when the boats start running again.

Source: Asian Trails, 25 September 2026 — Samui marine park announces temporary closure (2026-09-25); Ang Thong Marine Park — Ang Thong Marine Park closure 2026: closed 1 November to 15 December (publication date not stated); Thai National Parks — Mu Ko Ang Thong National Park: fees, attractions and accommodation (publication date not stated); TAT Newsroom — Thailand's national park system starts annual seasonal closure of attractions (publication date not stated); Thaizer — Annual closure of national parks in Thailand (publication date not stated).