Do I really need a raincoat in 30°C weather?

Yes. When it rains in Thailand, it pours. You will get soaked to the bone in 30 seconds without one, and a rain shell will keep your base layers dry.

Should I bring a poncho?

Skip the cheap plastic ponchos. They trap heat and will make you sweat more than the rain would. A breathable, vented jacket is much more comfortable.

Packing for Thailand's Rainy Season

Prioritize quick-drying fabrics, waterproof gear, and slip-resistant footwear to handle high humidity and frequent downpours. Leave the heavy denim and bulky hoodies at home, as they will never fully dry in the tropical moisture.

Choose high-performance fabrics. Stick to synthetic blends, linen, or merino wool. Avoid 100% cotton, which becomes heavy and stays wet for days once soaked.
Protect your electronics. Bring a dry bag or a high-quality waterproof sleeve for your phone and camera. Humidity can be as damaging as direct rain.
Upgrade your footwear. Pack sandals with a solid grip (like Chacos or Tevas) rather than flip-flops, which get dangerously slippery on wet stone sidewalks. Avoid canvas sneakers as they turn into sponges.
Bring a lightweight rain shell. A breathable, unlined rain jacket is better than an umbrella, which is useless against Thailand’s frequent gusty winds.

Do I really need a raincoat in 30°C weather?: Yes. When it rains in Thailand, it pours. You will get soaked to the bone in 30 seconds without one, and a rain shell will keep your base layers dry.
Should I bring a poncho?: Skip the cheap plastic ponchos. They trap heat and will make you sweat more than the rain would. A breathable, vented jacket is much more comfortable.