Koh Samui Waterfalls: The Honest Complete Guide

The Koh Samui waterfalls are what everybody adds to the plan on day three, once the sunburn has arrived and the beach has been thoroughly sat on. They're worth doing. What nobody tells you is that this island's interior is a mountain covered in coconut and durian, the falls run on rain rather than on your holiday dates, and one of them has a genuine body count.

We live on the coast in Chaweng Noi and we've driven all of these. Here's the set, honestly.

Na Muang 1 and 2: the famous pair

Na Muang is the one every sign points at. It sits inland in the south, about 12 kilometres from Lamai up Route 4169, and it's two separate waterfalls that people keep treating as one.

Na Muang 1 is 18 metres of water sliding into a wide plunge pool, five minutes down a paved path from the car park. You can swim in it. Toilets and snack stalls. It's the fall for people who want the photo and not the cardio.

Na Muang 2 is 80 metres and the tallest on Samui. Roughly 2.7 kilometres round trip with about 260 metres of climb, 30 to 45 minutes each way, part paved and part jungle path with wooden walkways and knotted ropes on the steep bits. A proper hike in proper heat.

The full Na Muang guide is separate, including the elephant trekking outfit that shares the Na Muang 2 car park and why we send nobody near it.

The Na Muang 2 warning we give our own guests

This is the part the tour desks skip, so we won't.

People have died at Na Muang 2. Not one freak accident. The Bangkok Post reported a 23-year-old Romanian tourist who slipped and fell to their death at Na Muang while taking a photo, and Thai press covered a young French tourist killed falling from an upper tier of the same falls, with his girlfriend saved by a tree branch. Multiple serious injuries have made the news between them. Rescue is a long way up a mountain and the response is not fast.

The pattern is always the same. Somebody climbs above the main pool, onto wet rock, to get a better picture, on a fall that is 80 metres top to bottom.

So: go up, look at it, swim in the pools at the top if the water is running, and don't scramble past the roped sections for a photograph. That's the entire safety briefing and it's enough.

Hin Lad: the one with the temple

Hin Lad, sometimes spelled Hin Lat, is over on the west side near Nathon and it's the one we'd send you to. You park at Wat Namtok Hin Lat, a working forest temple with fish ponds and a bridge, then walk in from there.

The trail runs about 3 kilometres round trip, 30 to 45 minutes each way, through real rainforest with small cascades and swimmable pools along the river before the 30-metre main fall. Wear trainers. The path is dirt, rock and roots, and everyone you pass doing it in flip-flops is having a worse time than they're letting on.

Entry is free and there are no food stalls, so carry your own water. Two warnings: the little fish in those pools nibble, and the temple gets busy with local families at weekends.

Tan Rua, the Secret Falls: the one in Maenam's back hills

Tan Rua is inland behind Maenam and the drive is the attraction. Steep mountain road, a sharp descent at the end, and a car park with a cafe, decent toilets and a zipline operation attached. From the cafe the walk to the falls is about 200 metres of easy dirt trail.

Two caveats. It's the one most likely to be switched off: recent visitor reports include arriving to find no water at all, which is what a small fall does at the end of a dry spell. And the pool at the bottom is rocky with no clean way in, so it's a look rather than a swim. Climbing the rocks beside it is how people scrape themselves bloody.

If you're on a rented scooter, get an automatic with enough engine for hills. Some of Samui's steepest mountain roads are signposted as off-limits to small automatics for exactly this reason.

Khun Si: the small one nobody drives to

Khun Si sits in the hills behind Maenam and Bophut, up through the durian plantations, alongside the viewpoint of the same name. The walk is tiny by comparison: half a kilometre out and back with about 38 metres of climb, so half an hour to an hour with a swim in the rock pool at the top.

It's not the biggest and it will never be the photo you lead with. It's quiet, it's usually empty, and if you've already done Na Muang and want jungle without a queue, this is the one nobody sends you to.

When to go, and what it actually costs

Timing matters more than which fall you pick. These are rain-fed. The flow is strongest during and just after the monsoon, roughly October through January, and a fall photographed in December looks like a different geological feature from the same fall in April. Come at the end of a long dry spell and you get bare rock and a trickle. That isn't a scam. That's weather, and it's the same reason our rainy season list exists.

Go early: softer light, cooler air, ahead of the tour vans. Skip the day after heavy rain if you're attempting Na Muang 2, because the steep section turns into a slide.

On money, be sceptical of anything you read, including this. Reports on Na Muang 2 range from free to 50 baht per person, parking runs somewhere around 20 to 60 baht for a scooter or a car, and Hin Lad is free. Nobody agrees because it genuinely changes. Carry small notes and stop worrying about it. Bring water, mosquito spray and shoes with a grip, all of which cost more than the entry ever will.

So which Koh Samui waterfalls should you actually pick?

If you have one morning and kids, Na Muang 1. If you want the hike and the scale, Na Muang 2, with your feet on the marked path. If you want the best half-day of the lot, Hin Lad, because the temple and the river pools make it a walk rather than a stop. Tan Rua if you like a mountain drive. Khun Si if you want to be alone.

Do it as a half day. Falls in the morning, back over the hill by lunch, into your own pool with the jungle rinsed off, dinner somewhere nobody is selling you a zipline. If quiet is the whole point of the trip, that's also the argument for our end of the island.

Quick answers

Are there any waterfalls in Koh Samui?

Yes, several. Na Muang 1 and 2 in the south, Hin Lad near Nathon in the west, Tan Rua behind Maenam and Khun Si in the Bophut hills. TripAdvisor and AllTrails list more, including Lat Wanorn, but those five cover what most visitors want.

How do I get to Na Muang Waterfall 2?

Drive to the Na Muang car park off Route 4169, roughly 12 kilometres inland from Lamai and well signposted. From there it's a 2.7 kilometre round-trip climb, 30 to 45 minutes each way, with ropes on the steepest parts. Hours are daytime, around 9 to 5.

What is the best waterfall in Koh Samui?

Na Muang 2 for sheer scale, since it's the island's tallest. Hin Lad if you want the better overall walk, with a forest temple at the start and swimmable pools most of the way up.

When is the best time to see Koh Samui's waterfalls?

During and just after the rains, roughly October to January, when the flow is at its strongest. Late in the dry season the smaller falls can slow to almost nothing.

Are Koh Samui's waterfalls safe?

The trails are fine if you wear real shoes and stay on them. Na Muang 2 is the exception and it is a serious one. There have been several reported deaths there, almost all from people climbing above the main pool onto wet rock to take photographs. Don't be one of them.