Koh Samui tourism statistics: the 2025 dip that missed the island

Thailand's foreign arrivals fell 7.23% in 2025, to 32,974,321. Koh Samui's did not fall. Samui International Airport handled close to 3 million passengers, the busiest year in its history. The Koh Samui tourism statistics that should worry a buyer turned negative in 2026, not 2025 — and for a completely different reason.

What do the 2025 Koh Samui tourism statistics actually show?

Start with the national picture, because that is the one that made headlines. The Ministry of Tourism and Sports recorded 32,974,321 foreign arrivals in 2025, down 7.23% from 35.55 million in 2024. Receipts fell 4.71% to roughly ฿1.53 trillion. It was the sharpest drop since the pandemic. One market caused most of it: Chinese arrivals came in at 4,473,992, down 33.55%, which pushed China into second place behind Malaysia's 4,520,856.

Samui's year looked nothing like that. C9 Hotelworks counted 1,127,832 passenger arrivals at the island's airport between January and April 2025 — up 9% on the same four months of 2024, during a period when the national figure was already sliding. Cruise traffic rose in step: 35 ships and 65,792 passengers, up 6%. Across the full year the airport handled about 3 million passengers. Bangkok Airways, which owns and operates it, puts that at 3.02 million across 33,823 flights; Kaohoon International reported 2.99 million. Either way, a record.

• Thailand 2025: 32,974,321 foreign arrivals, down 7.23%; receipts about ฿1.53 trillion, down 4.71%
• China 2025: 4,473,992 arrivals, down 33.55% — roughly 2.3 million fewer visitors than 2024
• Samui airport, January to April 2025: 1,127,832 arrivals, up 9% year on year
• Samui airport, full year 2025: about 3 million passengers, the highest on record
• Samui accommodation stock: 634 properties and 24,188 keys, growing at a 1% five-year compound rate

Why did Samui hold up when Thailand did not?

Because Samui barely sells to the market that collapsed. Europe supplied 56% of the island's international arrivals in 2024 — Germany 16%, the United Kingdom 11%, France 10% — and China has never been a large share of Samui's mix. The 2025 national decline was, to a first approximation, a Chinese decline. An island that does not depend on Chinese visitors did not feel it.

Supply did the rest. C9 counted 634 accommodation providers and 24,188 keys on the island, with supply growing at a compound 1% a year over five years. One runway, a capped number of daily slots and no room to sprawl means Samui cannot add rooms the way a mainland resort can. Rates reflected it: average daily rate rose 9% across 2024 and was 21% higher year on year in April 2025.

What changed in 2026

The concentration that protected Samui in 2025 is the same concentration that exposed it in 2026. Around a third of Europe–Asia passenger traffic routes through Middle Eastern hubs flown by Emirates, Qatar Airways, Etihad and Gulf Air. When Gulf airspace was disrupted early in 2026, that corridor thinned out. In the first nine days of March 2026 Thailand recorded 741,063 foreign arrivals, down 5.69%; European arrivals were down 14.39%, and long-haul arrivals as a group down 13.98%. In April the Tourism Council of Thailand cut its 2026 forecast from 34 million to 32.14 million.

The full-year picture is milder than the spring, because short-haul Asia partly filled the hole — China is back at the top of the table. Between 1 January and 1 August 2026, Thailand recorded 18,510,243 foreign arrivals, down 3.19% year on year, generating ฿896.2 billion. But hotels tell a harder story than headcount does. The Thai Hotels Association put national occupancy at about 52% in June 2026 and 53% in July, below the same month in 2025.

The 2025 story and the 2026 story are not the same event. 2025 was a demand problem in one source market. 2026 is an access problem in the source market Samui actually depends on. A buyer reading last year's record numbers is reading the wrong year.

What we could not verify

No island-level arrivals figure for 2026 has been published. We looked for one and could not find it. Trade press reported Samui hotel occupancy at roughly 36% between June and mid-July 2026, alongside about 37% in Krabi and 20% in Phang Nga — but that reporting quoted the Phang Nga tourism association rather than any Samui source, and we could not trace it to a primary document. Treat it as an indication, not a statistic.

The airport numbers need a caveat too. C9's 2.78 million for 2024 is described as air arrivals; Bangkok Airways' 3.02 million for 2025 is described as passengers. If one counts arrivals and the other counts arrivals plus departures, they are not comparable, and the apparent gain between them is partly an artefact of the definitions. That 2025 was a record year is well supported. The precise growth rate is not.

What arrivals data does and does not tell a villa buyer

Arrivals are a headcount, and a headcount is not income. What determines what a villa earns is nights sold and the rate they sell at, and both can move against the headcount. Thailand's April 2026 arrivals fell 7% year on year while tourism revenue for that month rose 2.94%. Fewer visitors, spending more. At the top of the market that is not a bad trade, and it is invisible in the arrivals line everybody quotes.

The structural argument for the island is supply, not demand. Demand shocks are cyclical — an absent Chinese market, a closed air corridor, a strong baht. Supply constraint is not. About 1% annual growth in hotel keys on a slot-limited island is why rates recovered quickly after each previous shock. The airport is being enlarged: Bangkok Airways is spending ฿600–700 million to lift capacity towards 5–6 million passengers a year, with construction from mid-2026 over two to three years, and the daily slot ceiling has been approved to rise from 50 flights to 73. That raises the ceiling on visitors. It does not create more land to build villas on.

How to underwrite a purchase in a soft year

Use 2026's numbers, not 2025's. If a villa's economics work at low-fifties occupancy and today's rates, they work. If they only work at the record year, that is not economics, it is a forecast. When a developer or agent quotes you a yield, ask which year's occupancy it assumes and whether that year was a record — the answer is usually the whole argument.

We should say plainly that we are not a neutral party. We build and sell villas here, and we own and operate one in Chaweng Noi that has traded through both the 2025 record and the 2026 softness. That is exactly why we publish the weak figures alongside the strong ones. A buyer who has seen a bad year and still wants to buy is a better outcome for everyone than one who only ever saw the good one.

Did tourism on Koh Samui fall in 2025?

No. Thailand's national arrivals fell 7.23% to 32,974,321, but Samui airport recorded its busiest year ever at close to 3 million passengers, with January–April arrivals up 9% year on year. The national decline was driven mainly by a 33.55% drop in Chinese visitors, and Samui's market is roughly 56% European.

What are the latest Koh Samui tourism statistics for 2026?

No island-level 2026 figure has been published that we could find. Nationally, Thailand recorded 18,510,243 arrivals from 1 January to 1 August 2026, down 3.19% year on year, with European arrivals hit hardest in the spring following Gulf airspace disruption.

Where do Koh Samui's visitors come from?

Europe supplied 56% of international arrivals in 2024 — Germany 16%, the United Kingdom 11% and France 10% were the largest single markets. That is a very different mix from Thailand as a whole, where Malaysia, China and India dominate the count.

Does a soft tourism year mean villa prices fall?

Not automatically, and we have not seen evidence that they have. Arrivals affect rental income more directly than capital values, and Samui's accommodation supply has grown at only about 1% a year over five years, which limits how far rates fall in a weak season. But nobody should treat that as a guarantee.

Is the Samui airport expansion actually happening?

Yes. Bangkok Airways, which owns the airport, has committed ฿600–700 million to a terminal project targeting 5–6 million passengers a year, with first-phase construction from mid-2026 over two to three years. The approved daily flight ceiling rises from 50 to 73.