Essential items
These are the things that will make or break your experience. If you forget everything else on this list, don't forget these.
Water shoes or old sandals with grip
This is the single most important item. The rocks are extremely slippery — people get hurt here every week. Flip-flops are a genuine hazard. "Water shoes" means something with a closed toe, a heel strap, and rubber soles that grip wet rock. You can buy cheap water shoes in Bangkok (sports markets, Decathlon, online) — do it before you go. Old sandals with heel straps and good grip work in a pinch. Going barefoot is not safe on the wet limestone.
Towel
You'll be swimming at multiple tiers and moving between water and sun. A standard beach towel is fine. A large microfibre travel towel works well too — lighter to carry, faster to dry. Bring enough towel to dry off properly after your final swim before the drive back to Bangkok. 3 hours in a wet towel is miserable.
Dry bag or waterproof phone pouch
You will get splashed near the falls. The mist from tier 1 alone is enough to concern you. A simple 10-litre dry bag (available from outdoor stores or online for a few hundred baht) keeps your phone, wallet, and car keys dry. Alternatively, a waterproof phone pouch that clips around your neck works — but dry bags are more versatile. Whatever you bring, test it with a sink of water before you go.
Swimsuit and change of clothes
Wear your swimsuit under your clothes so you can change quickly at tier 1. Bring a full dry set for the drive home — including underwear and socks. The tour van or bus on the way back will be cold with AC, and you'll want dry everything.
Cash in baht
300 baht park entry for foreign adults (2026 rate). Motorcycles approximately 30 baht, cars approximately 50 baht. There are food stalls inside the park that also only take cash. Card payment at the gate is not consistently available — do not rely on it. ATM access before the park is not guaranteed either. Come with enough baht for park entry, food, and any extras.
Sunscreen (applied before entering the park)
Spray sunscreen is not allowed inside Erawan National Park — it's a water quality regulation to protect the ecosystem. Apply your sunscreen at the entrance area before you go in, or apply it before you leave your accommodation. Use a cream or lotion SPF 50+. Reapply if you're staying more than 2–3 hours and it's a sunny day.
Insect repellent
Mosquitoes are more prevalent near the lower tiers, especially in the morning hours and during green season. DEET-based repellent is effective. Apply it before you enter the park — don't apply inside, and avoid getting it in the swimming pools. If you're sensitive to DEET, a picaridin-based repellent is a gentler alternative.