A country-by-country guide to travelling the region from October to December, from the flooded central coast of Vietnam to Timor-Leste’s whale season
Bangkok is wet again. This week the city’s drainage department reported standing water on five main road sections, and the Thai Meteorological Department expects isolated heavy to very heavy rain across the central region between 9 and 13 October. Yet fly from Bangkok to Chiang Mai tomorrow and you reach a north where the rain is easing. Fly to Da Nang and you arrive at the start of the central Vietnamese flood season. Fly to Dili and you land in the dry season, with whales passing offshore. Same region, same week, four different answers.
The usual advice is to avoid Southeast Asia from May to October and come in the cool, dry months instead. It is simple, and for much of the region it is wrong. October to December is where the calendar does the most damage to itineraries, because the southwest monsoon is leaving the mainland while the northeast monsoon arrives on the Gulf of Thailand, the east coast of the Malay Peninsula, the central coast of Vietnam and the eastern side of the Philippines. Indonesia, meanwhile, is waiting for a rainy season that El Niño has pushed back. This guide takes all eleven countries in turn, then closes with a plan for putting them together. Conditions are current at 10 October 2026, and I have named the sources where the detail matters.
The mainland: where the rain is leaving, and where it is only just arriving
Thailand first, because it is where I am writing from and because it is the country most often described as having a single season. It has at least three wet seasons running on different clocks. Bangkok and the central plains are in the tail of the rains, and this year the tail has been a heavy one. In late September, more than 300 millimetres fell on the capital in under 72 hours, disaster declarations covered all 50 districts, and the Tourism Authority of Thailand’s Chengdu office described the problem as one of perception rather than collapsing demand. Suvarnabhumi and Don Mueang airports stayed open, Phuket, Krabi, Koh Samui, Chiang Mai and Chiang Rai were not directly affected, and the advice to visitors was to allow an extra two to three hours between hotel and airport. That last point is the one I would keep. If you are in Bangkok in October, build slack into every transfer, keep the day after a long-haul arrival free, and treat an afternoon downpour as a reason for a long lunch rather than a crisis. The Andaman coast is at the end of its wet season, which runs from May to October, and the marine parks that close for it, the Similan and Surin islands among them, usually reopen from mid-October. Confirm the 2026 date with the park before you book a liveaboard. The Gulf coast runs on a different clock: Koh Samui and Koh Phangan are wetter from October to December, which catches out anyone who assumes the whole southern coastline behaves the same way. In the north, the rains ease through October and the lantern festivals around the November full moon arrive just as the skies clear.
Light rain is a fact of life in Bangkok from May to October, and rarely a reason to cancel anything.
Vietnam needs to be read as three countries, not one. The central coast, from Hue through Da Nang to Hoi An, is the one to watch from October. Flood season there runs from roughly September to December, October is when rivers first break their banks and Hoi An’s riverside streets can go under, and November is usually the worst month, when typhoon landfalls bring the heaviest flooding and the longest transport disruption. Last October, record rain submerged parts of Hoi An’s old town and sent the river in Hue above alert level 3. That is a pattern, not bad luck. The north is the better bet from October: the heat drops, the air tends to dry and Hanoi usually has its best weather of the year through the autumn. The south, around Ho Chi Minh City and the Mekong Delta, stays wet until about November before the dry season takes hold. If your route insists on the central coast, book refundable rooms, choose upper floors on the river side, keep two or three spare days between Hue, Da Nang and Hoi An, and take the train rather than the road in heavy rain, accepting that it may run many hours late. Floodwater in Hoi An tends to peak and recede within a few days, so one dry base and patience beat a panicked rebooking.
Cambodia is the country where the wet season is the show. The Tonle Sap lake is at or near its fullest in October, flooded forest and floating villages are reachable by boat, and Angkor is quieter and greener than at any point in the dry months. Each autumn the Tonle Sap River reverses direction as the Mekong falls, and the Water Festival in Phnom Penh is built around that moment. Phnom Penh will not hold it this year. The government has called off the capital’s celebrations planned for 23 to 25 November for the second year running, citing shifting national priorities including border issues, public needs and aid for displaced people. The three-day public holiday stands, provincial celebrations may go ahead according to local tradition, and travel to Phnom Penh is not restricted, but expect a quieter riverfront than the guidebooks promise and busier domestic transport over those days. The southern coast and islands remain rough through October and settle from November.
Laos shows the mainland monsoon in retreat. The rainy season runs roughly from late May to October, with the south wetter than the north (Champasak and Vang Vieng take the heaviest falls, Luang Prabang and Nong Khiaw rather less). The Mekong rises from August and peaks around November, which usually means the Four Thousand Islands are at their most dramatic at high water, and slow boats on the northern reaches run more reliably than they do in the spring. The end of Buddhist Lent, around the late October full moon, brings the boat-racing festivals to Vientiane and the Mekong towns, and That Luang Festival follows in November. Both are worth planning a week around. Roads in the hills can be slow after heavy rain, so give any long overland leg a spare day.
Myanmar is the hardest country in this guide to write about, and I will not pretend otherwise. On weather alone, the story is simple. The rains run from the end of May to October and ease through the autumn, Bagan and Mandalay in the central plains get lighter, shorter showers than the coast, and Ngapali’s beaches effectively close from June to September and reopen from November. The cool, dry season runs from November to February. On everything else, the UK Foreign Office currently advises against all but essential travel to Mandalay Region, which includes Bagan, and to southern and eastern Shan State, which includes Inle Lake, and against all travel to a long list of other states and regions, and warns that your insurance may be invalid if you go against it. Our own assessment of the ethical and practical case for and against visiting is linked in Further Reading. Check the advice for your own government before you consider a trip.
The Tonle Sap is at its fullest at the end of the rains, and boat travel is easiest.
Malaysia, Singapore and Brunei: the maritime edge, where November is the turning point
Malaysia splits down the middle, and the dividing line is the peninsula’s spine. The northeast monsoon brings the heaviest rain and roughest seas to the east coast, Kelantan, Terengganu and Pahang, from November to March, and the Perhentian, Redang and Tioman islands see boat services cancelled and many resorts close from about mid-November to February. If an east coast island is the plan, go before that, and be ready for a weather day. The west coast is largely sheltered from that monsoon, so Penang and Langkawi are workable from November onwards, with Langkawi the better choice if you want a beach in the rain months. September and October are wetter on the west, so do not assume that because it is sheltered it is dry. In Sabah and Sarawak, Kuching has frequent showers through the northeast monsoon and eastern Sabah turns very wet in December, though the rainforest is wet at any time of year, which is rather the point of it. The highlands, Cameron among them, carry a landslide risk after prolonged rain, and roads can close for a day or two without notice.
Singapore is easy to read once you know the pattern. October and November are inter-monsoon months, with light winds and thundery showers most afternoons, sometimes running into the evening. Last year the National Environment Agency had the northeast monsoon setting in around the end of November, and it typically runs to about March, with December and January usually the wettest months. Carry a compact umbrella, plan outdoor time for the morning and indoor time for the afternoon, and you will hardly notice the season.
Brunei is the quietest country on the list and the least documented, so treat what follows with some caution, because the English-language press there is thin and I am leaning on a single weather report. The southwest monsoon, which usually lasts until the end of September, is the stable, hot and drier one, and August this year was unusually so: by mid-month, rainfall at Brunei International Airport was running about 56 per cent below the monthly average, and the country had logged eight days of excessive heat. The northeast monsoon usually brings the wetter weather, building from November into the new year. For visitors, the practical point is Ulu Temburong National Park, reached by longboat up the Temburong River. Ask the operator how river levels are running before you commit, because a dry year and a wet month change the journey in different ways.
The archipelagos and the half-island: Indonesia, the Philippines and Timor-Leste
Indonesia is the one country where the calendar and the weather are out of step this year. The usual line for Bali is that the wet season starts around November. Indonesia’s meteorological agency, BMKG, now says the 2026/2027 rainy season is delayed in 529 seasonal zones, about 61 per cent of the land area, with most regions only entering the rainy season in November and December, peak rainfall arriving in December to February, and a very strong El Niño reducing rainfall in the meantime. Drought now covers 556 zones, about 62 per cent of the land area, and 25 provinces have gone more than 60 days without rain. For a traveller, that means an extended dry season: Bali, Lombok and the Komodo area may stay dry well into November, though BMKG’s figures are national and your island may differ. It also means water stress and, when the rains do arrive, a possibly abrupt change. Ask your accommodation about its water supply, and take shorter showers than you think you need. Do not plan around the textbook date, because it may not hold.
The Philippines is a straightforward story of choosing the right island. The typhoon season peaks between July and October, with the Philippine weather agency PAGASA’s own figures putting about 70 per cent of the country’s typhoons in that window and September typically the busiest month. Bicol is often the first landfall and stays at high risk through November, and Eastern Visayas becomes highly exposed from September to November. Cebu and the central Visayas are more sheltered, but Typhoon Tino brought record flooding to Cebu last November and disrupted more than 100 flights. Palawan, El Nido and Coron included, sits furthest from the usual storm tracks and is the safest major destination in October, edging up to moderate risk in November. The dry season proper starts in December. If you travel anywhere in the Philippines before then, add two or three buffer days around any flight or ferry connection, avoid same-day links to outer islands, and check your insurance for trip interruption cover before a storm is named, because most policies exclude storms once they have a name. Flights cancelled because of a typhoon entitle you to a refund under the Air Passenger Bill of Rights, so you are not obliged to accept a rebooking.
Palawan sits furthest from the usual typhoon tracks, which is why it is the safest bet in the Philippines before December.
Timor-Leste is the one country in this guide where October is the easy month. The country joined ASEAN as its eleventh member last October, few people visit, and October is as good a month as any to correct that. The dry season runs roughly from May to November, the roads are at their most reliable, and whales and dolphins pass through the Wetar Strait from October to December. The wet season, roughly November or December to April, brings road damage, landslides and interrupted ferries, so leave spare days for Baucau, Tutuala and the south coast, and confirm ferry departures to Ataúro and Oecusse locally and leave a flexible return day. Roads in the mountains and in the east are rough at the best of times, so hire a local driver, avoid driving after dark and treat your map app as a suggestion. The US dollar is the currency, so bring clean US$5, US$10 and US$20 notes, because cards work unevenly outside Dili. Most nationalities can get a 30-day visa on arrival for US$30 in cash. English-language reporting on Timor-Leste is thin and much of this rests on one source, so check the latest entry requirements with your embassy before you travel.
Putting it together: a plan for October to December
The table below reduces the above to one line per country. Use it to rule places out first, then read the paragraph for the ones you keep.
| Country | October | November and December |
|---|---|---|
| Thailand | Wet in Bangkok and the central plains. Andaman seas settling, parks reopening. Gulf coast wetter from now | Gulf coast wettest to December. North and Andaman improving, with the peak season arriving |
| Vietnam | Central coast at high flood risk. North drier and cooler. South still wet | Central coast usually worst in November. North and south better. Dry season builds by December |
| Cambodia | Tonle Sap at its fullest. Angkor quiet and green. Coast rough | Phnom Penh Water Festival cancelled (23-25 November). Coast settles. Dry season sets in |
| Laos | Rain easing. Boat-racing festivals around the end of Buddhist Lent | Mekong at its peak. Cool, dry weather |
| Myanmar | Rain easing. Central plains see short showers. Check the FCDO advice first | Cool, dry season. Ngapali reopens. The FCDO advice limits where you can go |
| Malaysia | West coast wetter. East coast islands still open | East coast islands close from about mid-November. Langkawi and Penang workable |
| Singapore | Inter-monsoon, thundery showers most afternoons | Northeast monsoon from about late November. Wettest in December and January |
| Brunei | Rain tends to build after an unusually dry summer | Northeast monsoon brings wetter weather. Check river levels for Ulu Temburong |
| Indonesia | Dry season stretched by El Niño. Hot and dry in many regions | Rains arrive in November and December in most regions. Peak December to February |
| Philippines | Typhoon risk high in Bicol and Eastern Visayas. Palawan the safest | Palawan moderate in November. Dry season from December |
| Timor-Leste | Dry season. Whale and dolphin season begins | Whale season to December. Wet season from November or December |
Three itineraries come out of it. The first is a late October loop through the north: Chiang Mai as the rains ease, then a flight to Luang Prabang and the Laos-China railway on to Vientiane for the boat racing at the end of Buddhist Lent, which keeps you off the hill roads when they are slowest. The second is an island-and-water trip that keeps ahead of the rain: Bali or Lombok and Komodo in the extended dry season, with the Wetar Strait whales off Timor-Leste added if you have a spare week. The third is a November reset for people who want beaches and a safe bet: Palawan in the Philippines, then Langkawi or Penang in Malaysia, both outside the worst of their regional weather. None of them touches the central coast of Vietnam, which is out until at least December, or the Malaysian east coast islands after mid-November.
The same handful of rules work in every country listed here. Book refundable or date-changeable rooms. Build two or three spare days around any flight, ferry or train you cannot afford to miss. Choose rail or air over long road journeys in heavy rain. Carry cash and an offline map, because power cuts can follow a flood and ATMs go quiet. Pack for wet rather than for cold: a lightweight rain shell, quick-dry clothes and a dry bag for your phone and passport will do more for you than an umbrella that turns inside out. Buy insurance that explicitly covers natural disasters and trip interruption before you leave, and read the exclusions for named storms. There is a responsible case for going, too. Hotels, guides and boat operators depend on the few visitors who come in the low months, and a traveller who stays a little longer, books direct and eats locally matters more to them in October than in January.
Back to Bangkok, where the forecast still says rain until at least 13 October. Pack for it, book flexibly, and pick the country that suits your dates.
Further Reading
- Koh Chang in Green Season: When Thailand’s Elephant Island Reveals Its Wildest Beauty – what one island looks like when the rain keeps the crowds away.
- What’s Happening in Myanmar: A Responsible Traveller’s Assessment – the ethical and practical case for and against going, in full.
- Southeast Asian Cultural Etiquette: A Complete Guide to Respectful Travel – customs for all eleven countries, to read before you land.
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