Asia

Thailand in September

Peak monsoon nearly everywhere: flooded streets in Bangkok some years, heavy Andaman seas, and rising rain on the Gulf. The year's lowest prices are the honest consolation.

Think twiceThe wettest month, highs near 89F (32C)

Longtail boats at Maya Bay, Ko Phi Phi, Thailand — ThailandPhoto: Diego Delso, CC BY-SA 3.0

The straight answer

September is a month to think twice about visiting Thailand. Peak monsoon nearly everywhere: flooded streets in Bangkok some years, heavy Andaman seas, and rising rain on the Gulf. The year's lowest prices are the honest consolation.

Weather: The wettest month, highs near 89F (32C)
Crowds: 1 of 5
Prices: 1 of 5

What September is like in Thailand

September is Thailand's wettest month, and it is the one to avoid. Peak monsoon covers almost everywhere, with highs near 89F (32C). Bangkok streets flood in some years, the Andaman seas are heavy, and rain is rising on the Gulf too. The Phuket Vegetarian Festival may run in late September, depending on the lunar calendar. Prices are the lowest of the year.

Only come if cheap rates matter more than weather and you are flexible day to day. Families wanting beach time should pick another month. Aim for November through February for dry skies and calm seas, or June on the Gulf coast for a low season value trip.

Make the most of September

What is especially good about Thailand this month.

Lowest prices of the year

Resorts and flights are at their cheapest, which is the honest reason to come.

Phuket Vegetarian Festival

In years when it lands in late September, this intense Taoist festival brings processions and ascetic displays, some graphic.

Bangkok indoors

Temples, markets, and museums in Bangkok still work well between downpours.

What to pack for September

A sturdy rain jacket
Sandals that can handle flooded streets
Quick-dry clothes
Mosquito repellent

Our timing tip

Book everything refundable and keep a flexible plan, since storms can cancel boats at short notice.

Book Thailand for September.

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Hotels. Expedia
Hotels in Thailand
Opens a hotel search for Thailand in September, dates filled in. Book early for the best months: the good rooms go first.
Hotels for September
Vacation rentals. Vrbo
Vacation rentals in Thailand
Whole homes, condos and villas. Usually the better deal for families and groups, with a kitchen and room to spread out.
Rentals on Vrbo
Tours and tickets. Expedia
Tours and tickets in Thailand
Timed-entry tickets, day trips and guided tours in Thailand for September. Popular slots sell out in the best months.
Tours and tickets

What's on in September

Phuket Vegetarian Festival

Nine days in late September or October, date follows the lunar calendar

A dramatic Taoist festival of processions and ascetic displays, some graphic. One of Thailand's most intense spectacles.

Things to do in Thailand

Full guide

Bangkok's Grand Palace and Wat Pho

The gold-spired heart of Thai royalty and the giant Reclining Buddha next door. Go at opening, dress with covered shoulders and knees, and ignore anyone outside saying it is closed.

Official site ↗Tickets and tours →

Bangkok street food crawl

Chinatown (Yaowarat) after dark is the classic run. Follow the lines of locals; the busiest stall is the menu.

Tickets and tours →

Chiang Mai's old city and temples

Moat-ringed lanes, hundreds of temples, and the mountain shrine of Doi Suthep above town. Best November through January; skip burning season in late winter.

Tickets and tours →

Railay and Krabi's limestone coast

Karst cliffs straight out of a painting, reachable only by longtail boat. Calm seas and full boat schedules run roughly November through April.

Tickets and tours →

Koh Phi Phi and Maya Bay

The famous bay operates with visitor limits and seasonal closures to let the ecosystem recover. Check current rules and book the earliest boat.

Tickets and tours →

Gulf islands: Samui, Phangan, Tao

Resorts on Samui, full-moon energy on Phangan, and some of the world's cheapest dive certification on Koh Tao. At their best when the Andaman side is stormy.

Tickets and tours →

Beat the crowds

Go in November or February: you get the cool-season weather of the December-January peak with a real step down in crowds and prices.
Pick one second-tier island (Koh Lanta, Koh Yao Noi, Koh Kood) over the marquee names; the beach is the same postcard with half the longtail traffic.
In Bangkok, see the Grand Palace at opening or after 3pm, and ride the river boats and BTS instead of sitting in taxi traffic.
Book Christmas to New Year and Songkran-week transport like concert tickets, months out. The rest of high season needs only days to weeks of lead time.

Know before you go

Andaman-coast monsoon (roughly May through October): some island ferry routes stop, boat trips cancel in rough seas, and the Similan Islands national park closes entirely, typically mid May to mid October.
Maya Bay and several marine parks now enforce visitor caps and seasonal closures for ecological recovery; rules change year to year, so check before promising anyone the famous beach.
Songkran (mid April) closes many offices and small businesses for days while the whole country travels; tourist attractions stay open and very wet.
During the Gulf coast's wettest stretch (roughly October into December), Koh Tao dive trips and Samui beach days get rain-checked; the Andaman side is simultaneously reopening.