Phuket in September is warm, green and very, very wet. You’re right in the middle of the southwest monsoon, so expect steamy days, rough seas and a lot more space to yourself. The trade-off? Cheaper stays, emptier attractions, and the island’s full tropical glow. Island-hopping takes a backseat this month. But cooking classes, massages, and indoor hangs step into the spotlight. If you don’t mind packing a poncho (and a back up plan), Phuket in the rainy season can be a quieter, better-value way to explore.

If you’re chasing beach clubs and blue-sky days, this isn’t Phuket’s peak. But if you’re into fewer tourists, flash hotel deals and a calmer pace, September might surprise you. Expect regular tropical showers — dramatic, but short — with sunshine in between.

It’s not the best time for swimming or boat-hopping (especially around Phi Phi and Similan), but land-based fun is still on. Fewer crowds mean easier access to temples, markets and spa days. And if you’re lucky with the lunar calendar, you’ll catch the dramatic early days of the Vegetarian Festival: fireworks, rituals and all.

September is one of the cheapest months to visit Phuket, thanks to it being in the full swing of low season. Flights from Australia often dip, and big-name resorts roll out rainy-season deals. You might score a free night, cheeky suite upgrade or buffet brekkie just for showing up in September. Luxe digs feel way more gettable this time of year, especially mid-week, when it’s just you, the rain, and the dressing robe.

Fewer tourists also mean better odds on discounted transfers, spa days or Thai cooking classes. Just watch the fine print on boat tours — they don’t always refund if the weather turns.

September is peak wet season in Phuket, with around 400 mm of rain falling over 20 to 22 days. Don’t expect constant drizzle, though. Showers usually hit hard and fast, mostly in the afternoons or overnight. Mornings can still bring warm sun and cloud breaks.

Temps sit between 24–31 °C with humidity that’ll make your hair give up by breakfast. Pack light, breezy clothes. The west coast cops the wildest waves, with red flags flying on most beaches = no swimming and no dips. East-facing spots like Ao Yon stay a bit calmer, and inland sights are still a go. Bring waterproof shoes and a plan B.