Thailand’s meteorological department issued a warning on 24 October announcing heavy to very heavy rain in the south of the country from 24 to 28 October 2026, with more variable weather elsewhere. Such warnings are frequent in this season, but this one covers several busy tourist areas.
For a traveller, the question is not whether to cancel, but what may be disrupted and how to adapt.
What the warning says
Warning No.1 of series 273 for 2026 mentions heavy to very heavy rain in the South, with gusts and rough seas, from 24 to 28 October.
An earlier warning, No.13 of series 272, already flagged intense rain across the country. The two documents complement each other.
Affected areas
Southern Thailand has two coastlines: the Andaman Sea to the west and the Gulf to the east. Both can be hit, but not at the same time or with the same intensity.
West coast provinces such as Phuket, Krabi, Phang Nga and Trang are used to monsoon showers. Gulf provinces such as Surat Thani, Nakhon Si Thammarat or Songkhla follow a different pattern.
Ferries and boats
Sea links to the islands may be delayed or cancelled when the sea is too rough. Crossings to Koh Tao, Koh Samui, Koh Phangan, Koh Lanta or Phi Phi depend on conditions. Companies decide in the morning and inform passengers.
Sea trips
Diving, snorkelling and day boat trips are the first to be suspended. Serious operators refund or reschedule, but check booking conditions. Do not insist on going out when the sea is bad.
Roads
Intense rain can cause local flooding, landslides and closed roads, especially in hilly areas and on secondary routes. Bus or car journeys may take longer: allow margins, especially to reach an airport or port.
Trains
The rail network is generally less affected than roads, but sections can be flooded or interrupted. Delays are possible; stations communicate changes and tickets can be amended.
What to check before leaving
Sea conditions for crossings, road conditions for land travel, and the forecast for the days ahead. Ferry companies, tourist offices and the meteorological department provide this. The 1182 hotline reaches weather services.
Precautions
Bring rain protection, shoes that tolerate water and a copy of your documents. Do not cross a flooded road. On site, follow local advice, often more precise than general forecasts.
Travellers already there
If you are on an island, check planned links and keep a margin before your return flight. A cancelled ferry can strand you for a day or two. Hotels often extend stays in case of force majeure, but ask early.
The upside
Monsoon rain does not last all day. It often falls in the late afternoon, and mornings remain usable. Landscapes are greener, waterfalls more spectacular, and crowds smaller.
FAQ
Should I cancel an island stay?
Not necessarily, but check sea links and allow margin.
Are ferries refunded?
Depends on the company and ticket conditions.
Can I swim?
Follow flags and instructions.
Does it rain all day?
No, often over a few hours.
Where to find official information?
The meteorological department website.
Sources and references
- TMD — Heavy to Very Heavy Rains in the South, warning No.1 (273/2026), 24-28 October 2026
- TMD — Heavy to Very Heavy Rains in Thailand, warning No.13 (272/2026)
To go further
Mr Schaka’s guidebook, Koh Samui and the Islands – The Practical Guide, covers the essentials: transport, neighbourhoods, addresses, food, etiquette and safety, updated for 2026–2027.
