Overview
The Na Muang Waterfalls are Koh Samui’s most famous cascades: two distinct falls hidden in the lush jungle interior of the island’s southern hills. Na Muang 1, the lower waterfall, drops 18 meters over purple-tinted rocks into a deep natural swimming pool just 100 meters from the car park. Na Muang 2, the upper waterfall, is the tallest on the island at 80 meters, a multi-level cascade reached only by a 30-minute jungle trek.
Together they offer the full spectrum: a family-friendly swimming hole and an adventurous jungle hike to a dramatic viewpoint. The name “Na Muang” means “purple” in Thai, referring to the mineral-stained rock face that gives the lower falls their distinctive color.
History: The Purple Waterfall
The Na Muang Waterfalls take their name from the purple-hued rocks over which the water cascades. This distinctive coloring comes from mineral deposits in the stone, most visible when wet, giving the falls a violet shimmer during and after rain.
The waterfalls sit within the Na Muang Forest Park in Samui’s southern interior. For generations they have been a gathering place for local families and a source of fresh water for nearby communities. As tourism developed on the island, the lower falls became one of Samui’s first natural attractions, with a car park, stalls, and walking paths built to welcome visitors.
The surrounding jungle is part of one of the last intact rainforest zones on Koh Samui: an area that has resisted development due to the steep terrain.
Na Muang 1: The Lower Falls
Na Muang 1 is the accessible waterfall: the one you see in every Samui guidebook. A flat, paved walkway leads 100 meters from the parking area through a corridor of souvenir stalls selling sarongs, coconut bowls, and elephant trinkets.
The waterfall itself is a broad, 18-meter cascade pouring over a wide purple rock face into a natural pool approximately 5 meters deep. The pool is large enough for swimming, and surrounding flat rocks provide spots for sunbathing and picnicking.
What makes it special
- The purple rocks: The mineral-stained cliff face glows violet when wet, most vivid during rainy season
- The swimming pool: Deep enough for a proper swim, refreshingly cool after the tropical heat
- Accessibility: No hiking required, families with small children, elderly visitors, and anyone in flip-flops can reach it
Na Muang 2: The Upper Falls
Na Muang 2 is a completely different experience. At 80 meters, it’s the tallest waterfall on Koh Samui: a multi-tiered cascade dropping through dense jungle canopy. The only way to reach it is a 30-minute uphill trek through the forest from Na Muang 1.
The reward at the top is a smaller, shallower pool surrounded by massive boulders, and a panoramic viewpoint overlooking the island’s interior. Far fewer visitors make the climb, so you may have the waterfall entirely to yourself.
The Trail: What to Expect
The combined trail to both waterfalls is approximately 2.7 km out-and-back (per AllTrails). The experience divides neatly into two halves.
Na Muang 1 approach (easy)
- 100 meters on flat paved path from parking
- Lined with souvenir stalls
- Accessible for all fitness levels
- 5 minutes walk
Na Muang 2 trail (moderate to challenging)
- 30-40 minutes uphill from Na Muang 1
- Terrain changes from concrete steps to dirt, roots, and boulder scrambles
- Several sections require climbing over rock faces using installed guide ropes, essentially a via ferrata
- Steep cliff sections with loose stone
- Sturdy shoes with grip are essential: flip-flops are genuinely dangerous here
- The trail is well-marked but can be slippery even in dry conditions
Swimming and Natural Pools
Na Muang 1 pool
The main attraction for most visitors. The pool at the base of Na Muang 1 is approximately 5 meters deep at its center: deep enough for swimming and even jumping from lower rocks. The water is cool and refreshing, fed by the mountain stream above.
Safety notes:
- Rocks underfoot and around the pool are slippery year-round
- Check depth and submerged rocks before jumping
- Never swim during or immediately after heavy rain: flash flood risk is real
- The pool floor has some sharp stones; water shoes help
Na Muang 2 pool
Smaller and shallower: more for cooling off after the hike than serious swimming. The setting is more dramatic, though: massive boulders frame a secluded pool with far fewer people.
Wildlife and Nature
The Na Muang watershed sits in one of Koh Samui’s last significant areas of primary rainforest. The jungle canopy is dense, and the trail to Na Muang 2 passes through some genuinely wild terrain.
What you might see:
- Butterflies, especially abundant near the water
- Monitor lizards basking on rocks
- Dusky langur monkeys in the canopy (more common in early morning)
- Tropical birds: kingfishers, sunbirds, bulbuls
- Massive ferns, strangler figs, and buttress-root trees along the trail
Nearby Attractions
Under 10 minutes
- Namuang Safari Park: Adjacent to the waterfall parking. Offers elephant and animal shows. Ethical note: Multiple reports of poor animal conditions, consider the ethical alternative, Samui Elephant Sanctuary in Bophut, the island’s first rescue sanctuary.
Under 20 minutes
- Secret Buddha Garden (Tar Nim Magic Garden): Hilltop sculpture park with 80+ stone statues and jungle stream. Entry 80 THB. 4WD access recommended.
- Wat Khunaram: Famous for the preserved mummified monk (Luang Phor Daeng). Free admission. On the ring road near the Na Muang turnoff.
- Hin Ta Hin Yai (Grandfather and Grandmother Rocks): Iconic phallic rock formations on the coast near Lamai Beach.
- Lamai Beach: Full beach with restaurants, bars, and swimming. 15 min drive.
Where to Eat Nearby
At the waterfall: Simple food stalls near the parking area sell Thai snacks, grilled skewers, fresh fruit, and cold drinks (40-100 THB per item).
Within 15 min drive:
| Restaurant | Location | Cuisine | Price Range |
|---|---|---|---|
| EVA Cafe and Restaurant | Route 4169 | Thai, Fusion | $$-$$$ |
| Kob Thai Restaurant | Lamai Beach | Thai, Seafood | $-$$ |
| The Oyster Bar X Samui | Lamai Beach | Seafood, Wine Bar | $$$ |
| Lamai Beach strip | Lamai | Various | Thai meals 80-250 THB |
Getting There
Location
Na Muang is in the south-central interior, off Route 4169 (the ring road). Look for the signed turnoff between Nathon and Lamai. The road inland to the parking area is paved.
From different areas
| Starting Point | Drive Time | Taxi Cost |
|---|---|---|
| Nathon Town | 10-15 min | 400-600 THB |
| Lamai Beach | 15-20 min | 400-600 THB |
| Chaweng Beach | 25-30 min | 600-800 THB |
| Bophut | 30-35 min | 700-1,000 THB |
Transport options
- Scooter: Most popular option. 150-200 THB/day rental. Follow Route 4169 and the Na Muang signs.
- Private taxi: Negotiate fare in advance, no meters on Samui.
- Songthaew: Available but infrequent to this inland location.
- Organized tours: Many half-day island tours include Na Muang as a stop.
Parking
Large lot at the entrance. 60 THB for cars, 20 THB for motorbikes. Alternatively, park on the main road and walk ~20 minutes to avoid the fee.
Best Time to Visit
| Season | Months | Water Flow | Trail Condition | Rating |
|---|---|---|---|---|
| Late monsoon | Dec-Jan | Strong, dramatic cascades | Damp but stable | ★★★★★ |
| Dry season | Feb-May | Reduced, may trickle by April | Dry, safest hiking | ★★★ |
| Early monsoon | Jun-Sep | Building as rains begin | Increasingly slippery | ★★★ |
| Peak wet | Oct-Nov | Maximum flow, most dramatic | Slippery, can be dangerous | ★★★★ |
Timing tips
- Best balance: December to January, strong water flow from recent rains, trails stabilizing, good weather windows
- Worst time: Late March to May, waterfalls can reduce to a trickle, disappointing for photos
- Best time of day: Early morning (8-10 AM) or late afternoon (3-5 PM) to avoid midday heat and tour groups
Practical Tips
Essentials
- Footwear: Sturdy hiking shoes or grippy sandals for Na Muang 2. Flip-flops are fine for Na Muang 1 only.
- Swimwear: Bring it, you’ll want to swim at Na Muang 1
- Water: Carry at least 1 liter, the Na Muang 2 hike is strenuous in tropical heat
- Insect repellent: Mosquitoes are present year-round, worse in wet season
- Camera: Waterproof case recommended for the pool area
Safety
- Ropes on Na Muang 2 trail: They’re installed for a reason, use them on the rock-climbing sections
- Rain: Do NOT attempt Na Muang 2 in rain. The rocks become dangerously slick.
- Flash floods: After heavy rain, wait several hours before visiting either waterfall
- Time: Allow 1-2 hours for both waterfalls; 30 minutes if you only visit Na Muang 1
For families
Na Muang 1 is excellent for families: easy access, safe swimming in the pool (supervise children), interesting rock formations. Na Muang 2 is not suitable for young children due to the steep, rope-assisted trail sections.
Who Is Na Muang Best For?
| Traveler Type | Fit | Why |
|---|---|---|
| Families | ★★★★★ | Na Muang 1 is easy, safe, and fun for kids. Skip Na Muang 2. |
| Adventure seekers | ★★★★★ | Na Muang 2 is a proper jungle hike with rope climbing |
| Photographers | ★★★★ | Purple rocks, jungle pools, dramatic cascades, especially in wet season |
| Casual tourists | ★★★★ | Na Muang 1 alone is worth the short drive |
| Fitness enthusiasts | ★★★★ | Na Muang 2 trail is a solid workout in tropical heat |
| Budget travelers | ★★★★★ | Free admission, cheap parking, affordable food |
| Elderly/mobility limited | ★★★ | Na Muang 1 is flat and paved; Na Muang 2 is not accessible |
FAQ
How much does it cost to visit Na Muang Waterfalls?
The waterfalls themselves are free. Parking costs 60 THB for cars and 20 THB for motorbikes. You can walk from the main road (~20 minutes) to avoid the parking fee entirely.
Can you swim at Na Muang Waterfall?
Yes: Na Muang 1 has a large natural pool approximately 5 meters deep, perfect for swimming. Na Muang 2 has a smaller, shallower pool. Avoid swimming during or after heavy rain due to flash flood risk.
How hard is the hike to Na Muang 2?
Moderate to challenging. The 30-40 minute trail involves climbing over boulders, navigating rope-assisted rock faces, and steep jungle sections. Sturdy shoes are essential. Not suitable for young children or those with mobility issues.
What is the best time to visit Na Muang Waterfalls?
December to January offers the best balance: strong water flow from recent monsoon rains with improving trail conditions. Late March to May is the worst time as the waterfalls can dry to a trickle.
How do I get to Na Muang from Chaweng Beach?
Drive south on Route 4169 for about 25-30 minutes. The turnoff is well-signed. By taxi, expect to pay 600-800 THB one way. A rented scooter (150-200 THB/day) is the most flexible and cheapest option.
Is Na Muang Waterfall worth visiting?
Na Muang 1 is worth the stop for anyone on the island: it’s a 5-minute walk to a stunning swimming hole. Na Muang 2 is worth the effort for hikers who want the tallest waterfall on Samui and a genuine jungle adventure. Visit after rain for the most impressive cascades.
About the author
Migues Ferfumoz
Writer, Koh Samui resident since 2019
Freelance writer and Koh Samui resident since 2019. Migues covers local culture, food, and the best off-the-beaten-path destinations on the island.
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