September in Thailand is peak green season. Expect steamy jungle, tumbling waterfalls, and fewer crowds… if you’re happy to dodge some rain, that is. It’s the tail end of monsoon in most places, which means cheaper deals and lush scenery, but soggier sandals too. 

But, if you’re looking for beach time, don’t worry. You’ll still be able to get it! Just head east toward the islands between Bangkok and the Cambodian border. For culture, food and nature, this month can be gold. Just bring a poncho, a flexible attitude, and a few indoor backups.

Depends on what you’re chasing. September is peak green season across most of Thailand. This means tropical storms, high humidity, and some soggy shoes. But it also brings lush landscapes, shorter queues and cheeky hotel deals. Rain tends to hit fast and hard with dramatic arvo downpours, then sunshine peeking through like nothing happened. Mornings? Often clear enough for market strolls, temple stops or a cheeky mango sticky rice run.

Sure, hikes and island-hops can get rained off, especially up north or around the Andaman Coast. But if you're into lush jungle, steaming street food and the odd nap to rain-on-roof ASMR, September’s got its perks. Just bring a poncho, a bit of chill, and double-check those refund policies on boat tours, because the seas don’t always play nice.

It’s budget traveller bingo in September. With most of the country in low season, flights and hotels often drop their prices, especially midweek. Resorts roll out rainy-season deals, and you might just score a sneaky upgrade or bonus brekkie. Some tours throw in wet-season discounts too (hello, cooking class bundles).

The catch? Monsoon weather can mess with outdoor plans, and not all tours are refund-friendly. So, pack your flexibility and maybe a waterproof day bag. It’s a top-value month if you don’t mind the odd detour.

It’s wet in September in Thailand. Like flip-flops-floating-down-the-street wet, with 200–400 mm of rain depending on where you land. But it’s not all grey skies and soggy pad thai. Showers usually roll in fast and loud, then disappear just as quickly. Mornings are your best bet for dry adventures, so get out early, then let your arvo plans ride the weather wave. Always pack a poncho. And a plan B.

Temps sit between 24–32 °C, but it’s the humidity that really hits. It’s 85–90% in most places, so pack light layers. Nights get a little cooler up north, so if you’re into misty jungles, thundering waterfalls, and fewer tourists, it’s magic.