Is it better to wear loose clothing or nothing at all?

Wear loose, light-colored natural fibers like linen or hemp. They provide a barrier against the sun while allowing sweat to evaporate, which is more effective at cooling you down than exposed skin in direct sunlight.

How do I know if I'm getting heatstroke?

Warning signs include a sudden stop in sweating, confusion, nausea, or a throbbing headache. If you feel these, get into shade immediately, drink an electrolyte-rich beverage, and pour cool water over your wrists and neck.

Staying Cool in Thailand's Tropical Heat

Combat Thailand's extreme humidity by layering lightweight linen or moisture-wicking synthetic fabrics and staying indoors between 12:00 PM and 3:00 PM. Hydrate with electrolyte powders rather than just water to replace salts lost through heavy sweating.

Time your outdoor activities. Plan all walking tours, temple visits, or markets for before 10:00 AM or after 4:00 PM. The midday sun in Thailand is intense and can lead to rapid heat exhaustion.
Master the '7-Eleven' cooling break. Whenever you feel overwhelmed, duck into a 7-Eleven. They are ubiquitous, blast aggressive air conditioning, and sell cold drinks and wet wipes that can help lower your core temperature quickly.
Carry an electrolyte supplement. Drink at least 3 liters of water daily, but supplement with electrolyte packets (available at any pharmacy or convenience store) to prevent hyponatremia and fatigue caused by excessive sweating.
Choose your transport wisely. Opt for BTS/MRT (air-conditioned trains) in Bangkok whenever possible. If taking a taxi, confirm the driver turns the AC on immediately; if using a tuk-tuk, understand you will be in direct heat and exhaust fumes.

Is it better to wear loose clothing or nothing at all?: Wear loose, light-colored natural fibers like linen or hemp. They provide a barrier against the sun while allowing sweat to evaporate, which is more effective at cooling you down than exposed skin in direct sunlight.
How do I know if I'm getting heatstroke?: Warning signs include a sudden stop in sweating, confusion, nausea, or a throbbing headache. If you feel these, get into shade immediately, drink an electrolyte-rich beverage, and pour cool water over your wrists and neck.