Every list of Koh Samui beaches you have read was written by someone who wanted you to book a hotel on one of them. That is why Chaweng is always “lively”, Bophut is always “charming” and nobody mentions that half the north coast is a mudflat by mid-afternoon. Which of its twenty-odd beaches you end up on decides what kind of holiday you have, so here are thirteen, ranked by someone who has swum at all of them in the wrong month, with a verdict each. Nothing was comped. Several beaches are told to sit down.
The short version: Silver Beach and Choeng Mon are the best water on the island, Chaweng is the best swimming and the worst peace, Lamai is Chaweng for less money with an undertow, and Bophut, Maenam and Bang Po are for people who value a sunset dinner over a swim. Lipa Noi is the west-coast sunset. Everything else is a stop, not a base. Pick the beach first and the hotel second using our where to stay on Koh Samui guide, and check the month against our best time to visit Thailand calendar before booking.
How we ranked the beaches on Koh Samui
Four things, in this order: can you swim there most of the year without wading 200 metres or being dragged sideways; is the sand and water honestly good; can you eat and drink on the sand at a fair price; and can a normal person get there. Each entry ends with a Best for and a Skip unless, plus the walk-up beach-shack price of a lounger, a large beer and a pad thai — September 2026, cross-checked against our Thailand Price Index. One piece of geography explains most of the order: the east coast is deep and clear a few steps in and takes the October–December monsoon head-on; the north is shallow and tidal, calmer but knee-deep at low water for hours; the west is flat, sheltered and faces the sunset; the south is rocks and fishing boats.
The best Koh Samui beaches: the top six
1. Silver Beach (Crystal Bay / Haad Thong Takian). A 250-metre cove between Chaweng Noi and Lamai, with granite boulders at each end, the clearest water on the island and a reef you can snorkel from the sand. Swimmable every month bar the wildest weeks of November. The catch is size: by 11am in January it is a hundred people on a beach built for forty, and the loungers (฿150–200) belong to the two resorts. Come at 8am or after 3pm. Beer ฿100–130, pad thai ฿120–150. Best for snorkelling and swimming without a boat. Skip unless you can go early — at midday it is a queue.
2. Choeng Mon. The north-east corner: a wide horseshoe of soft sand with a little island you can wade to at low tide. Shallow, clear and genuinely calm — a five-year-old can stand chest-deep for an hour — and sheltered from most of the swell that hits Chaweng. The downside is the same shallowness: around low tide you are wading, not swimming. Beer ฿90–120, pad thai ฿100–140. Best for families, and Chaweng’s coast without Chaweng. Skip unless you’ll plan around the tide.
3. Chaweng Noi. The southern kilometre of the big beach, cut off by a rocky point, and the better half by every measure except nightlife: the same steep, clean, deep water, a fraction of the people, no jet skis, and a few hotels including The Library. No independent bars, so hotel prices: beer ฿150–180, food ฿200 up, loungers for guests. Walk south along the sand from Chaweng. Best for a proper swim with a book. Skip unless you’re staying there or bringing your own towel.
4. Lipa Noi. Two kilometres of flat, fine, pale sand on the west coast, facing the Ang Thong islands and the sunset. Bath-warm, glassy, and the calmest sea on the island in the monsoon. The honest problem is depth: at low tide it is ankle-deep for a hundred metres. Beer ฿80–100, pad thai ฿80–120, loungers free with a drink. You need wheels or a Grab (฿250–350 from Chaweng). Best for sunsets, space and anyone visiting October to December. Skip unless you can swim on the afternoon high tide.
5. Maenam. Four kilometres of north coast, coarser and yellower sand than the east, a steady slope that keeps it swimmable at most tide states, and Koh Phangan filling the horizon. The island’s best-value beachfront rooms are here — ฿800 fan bungalows up to Santiburi, the old-money resort at the eastern end. The water is greener than Chaweng’s. The Thursday walking street is the best of the small ones — see our Koh Samui night markets guide. Beer ฿80–100, pad thai ฿70–100, loungers ฿100 or free with a drink. Best for long walks, budget stays and the Phangan view. Skip unless you’re fine with sand that isn’t white.
6. Chaweng. Seven kilometres, the biggest beach on the island, and — whisper it — the best actual swimming: powdery sand, a steep drop into clear, deep water, an offshore reef that takes the edge off the surf. It ranks sixth because of everything behind it: the road of bars, beach clubs with ฿300 minimum-spend loungers, jet skis and parasail boats sharing your water from 10am, and the sheer volume of people from December to February. Independent loungers ฿100–150, large beer ฿120–140, pad thai ฿100–160. It is where most of the things to do on Koh Samui start. Best for beach, bars and boats within 200 metres of bed. Skip unless you like your beach with a soundtrack.
The rest of the Koh Samui beach list, honestly
7. Lamai. Chaweng’s cheaper sibling: four kilometres of decent sand, a rougher town, an older crowd. What the hotel websites leave out is the water: Lamai has the strongest undertow on the island, and from October to early January the red flags go up regularly — in February 2026 lifeguards and hotels were still raising them in a windy spell. That is how people drown here, and they do most years. Loungers ฿100, beer ฿80–110, pad thai ฿70–100. Best for Chaweng on a budget, January to September. Skip unless you respect a red flag — the current does not care how well you swim.
8. Bophut (Fisherman’s Village). Everyone loves Bophut and almost nobody swims there: coarse north-coast sand in front of a restored shophouse street with the island’s best dinners and the Friday walking street. The water is brownish and the beach nearly vanishes at high tide. As a base it is superb — Zazen at the western end is the small, grown-up pick — but you drive to a beach. Beer ฿120–150, pad thai ฿150–200. Best for eating, drinking and walking after dark. Skip unless swimming isn’t the point.
9. Taling Ngam. The south-west corner, where the InterContinental looks down on the Five Islands. The view is the best on Samui and the sunset is absurd. The beach is narrow, part-rocky, tidal and shared with fishing boats. Guests at InterContinental Koh Samui use the pools and are happy; nobody else has a reason for the 40-minute drive except a ฿200 sunset beer. Best for a resort week and the view. Skip unless you’re sleeping there.
10. Bang Po. Maenam’s western neighbour: longer, emptier, shallower, with a fringing reef that gives Samui’s best beach-entry snorkelling at high tide. Its one real reason is Haad Bang Po, the family-run seafood shack that has served sea urchin salad and grilled fish at ฿150–300 a plate for decades. Beer ฿80, very few loungers. Best for lunch and a high-tide snorkel. Skip unless you’re already on the north coast with transport.
11. Coral Cove. A tiny bouldered bay just north of Silver Beach with a reef straight off the rocks — arguably better fish than Silver Beach, in a cove a third the size. Beer ฿100, food ฿120–180. Best for a two-hour snorkel stop with a mask in your bag. Skip unless you’re combining it with Silver Beach next door.
12. Thong Krut. Not really a beach: a south-coast fishing village with grey sand, seafood on stilts and the longtails to Koh Tan and Koh Madsum. Koh Tan has the clearest snorkelling within twenty minutes of Samui; Koh Madsum has pigs on the beach. Walk-up charters from the pier were being quoted at roughly ฿1,500–2,500 per boat for a half day as of September 2026; agency trips with lunch and gear run ฿2,500–3,500 a head, plus a ฿50 landing fee on Madsum. Compare Koh Tan and Koh Madsum trips for a fixed price and a pickup. Best for the boat out and a seafood lunch back on the pier. Skip unless you’re going to Koh Tan.
13. Hua Thanon. On every map, and not a swimming beach. It is the island’s Muslim fishing village south of Lamai: painted longtails on stony sand, a mosque, and a wet market that is the most interesting hour on the south coast. Go at 7am, eat, photograph the boats, swim elsewhere. Best for the market and lunch. Skip unless you want the island that existed before the resorts.
Koh Samui beaches compared
| Beach | Best for | Swim season | Quiet (1–5) | Nearest stay (book) |
|---|---|---|---|---|
| Silver Beach | Snorkelling, swimming | Year-round bar Nov | 2 | Crystal Bay Beach Resort |
| Choeng Mon | Families, calm water | Year-round; wait for the tide | 3 | Choeng Mon village hotels |
| Chaweng Noi | A real swim, quietly | Jan–Sep best | 4 | The Library |
| Lipa Noi | Sunsets, monsoon calm | Year-round at high tide | 5 | Lipa Noi resorts |
| Maenam | Budget, long walks | Year-round; swell Nov–Dec | 3 | Santiburi |
| Chaweng | Beach plus nightlife | Jan–Sep; flags Oct–Dec | 1 | Chaweng hotels on Agoda |
| Lamai | Chaweng on a budget | Jan–Sep; undertow Oct–Dec | 2 | Lamai hotels on Agoda |
| Bophut | Dinner, walking street | Poor; tidal | 3 | Zazen / Anantara Bophut |
| Taling Ngam | Resort week, the view | Pool, mostly | 5 | InterContinental Koh Samui |
| Bang Po | Seafood, high-tide snorkel | High tide only | 4 | Small Bang Po resorts |
| Coral Cove | Snorkel stop | Year-round bar Nov | 4 | Coral Cove resorts |
| Thong Krut | Boats to Koh Tan | Not for swimming | 5 | Conrad Koh Samui (nearby) |
| Hua Thanon | Market, fishing village | Not for swimming | 4 | Lamai hotels |
When you can swim: Koh Samui beaches by season
January to April is dry, calm and clear: every beach here works. May to September is the south-west monsoon, which mostly hits the Andaman: Samui gets afternoon showers, sun most days, and the east and north coasts stay swimmable. October to December is the Gulf’s own monsoon: the north-east swell lands straight on Chaweng and Lamai, the red flags go up, and November is the wettest month. Tides matter as much as season on the north and west: Bophut, Bang Po, Lipa Noi and Choeng Mon all lose most of their depth at low water, so check a Samui tide table and swim on the rise. The Samui–Phangan–Tao ferries run through the monsoon but get cancelled on the roughest days; if you’re here for the Full Moon Party in November, build in a spare day.
The honest bit: rocks, plastic and jet skis
Rocks. Samui is a granite island and its beaches are punctuated by boulders, which make the snorkelling and are what you step on; ฿150 reef shoes are the best money you’ll spend, and sea urchins sit near the rocks at low tide. Plastic. In low season, and after any storm, the tideline on the north and east coasts carries a wrack of plastic, polystyrene and seaweed. Jet skis. Chaweng and, to a lesser extent, Lamai have them, and the operators are not fussy about distance from swimmers. Then there is the damage scam — rent one, bring it back, be shown a scratch that was there when you took it, and be asked for ฿20,000–50,000 — an old Samui routine. If you must, video every panel with the operator in frame first, and read our Thailand scams guide first. Better: don’t. Nobody has ever looked back on a holiday and treasured the jet ski.
Getting to Samui and between the beaches
Samui’s airport is the expensive way in (one airline, ฿3,000–7,000 one way) and the bus-plus-ferry via Surat Thani is the cheap one (฿1,000–1,500 all in, 12–14 hours). Every combination is in our Bangkok to Koh Samui guide; tickets are on 12Go: Bangkok to Koh Samui tickets. On the island, shared songthaews circle the ring road for ฿50–100 a hop, and a scooter is ฿200–300 a day if you have a licence and a helmet. The mainland side is in our Surat Thani province profile; if Samui’s water leaves you wanting clearer, that is Koh Tao’s job. Ang Thong’s 42 islands are a ฿1,200–2,000 day trip plus a ฿300 park fee — compare Ang Thong boat trips.
Koh Samui beaches: your questions, answered
Which is the best beach on Koh Samui?
For water and snorkelling, Silver Beach (Crystal Bay); for calm family swimming, Choeng Mon; for a proper deep-water swim with everything nearby, Chaweng or its quieter southern end, Chaweng Noi. Lipa Noi wins on sunsets and space.
Can you swim on Koh Samui in the rainy season?
May to September, yes, almost everywhere. October to December is the Gulf monsoon, when Chaweng and Lamai get red flags and a real undertow. In those months use Silver Beach, Choeng Mon and Lipa Noi, and never swim on a red-flag day.
Which Koh Samui beach is quietest?
Lipa Noi and Taling Ngam on the west coast are the emptiest by a distance, then Bang Po and the western end of Maenam on the north. Silver Beach is quiet at 8am and full by 11.
Is Chaweng or Lamai better?
Chaweng has finer sand, clearer water, more of everything and higher prices. Lamai is cheaper, older, more relaxed and has a stronger undertow, which matters from October to December. First-timers and nightlife people pick Chaweng; repeat visitors on a budget tend to pick Lamai.
How much do things cost on a Koh Samui beach?
At a beach shack in 2026, a lounger is ฿100–200 (often free with a drink outside Chaweng), a large beer ฿80–140 and a pad thai ฿70–160. Hotel beach clubs charge two to three times that, and Chaweng’s clubs run ฿300 minimum-spend loungers.
Related guides
- Where to Stay on Koh Samui: Beach by Beach
- Things to Do on Koh Samui: Worth It vs Skip It
- Koh Samui, Koh Phangan and Koh Tao by Ferry
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Hotels: compare Koh Samui hotels on Agoda and filter by beach, not island. Boats: Koh Tan and Koh Madsum from Thong Krut, or Ang Thong’s 42 islands — both on GetYourGuide via the links above. Getting there: flights, buses and ferries are on 12Go via the link in the transport section. Not sure the Gulf is even your coast? Our Where to Go in Thailand matcher scores all 77 provinces against your month, your budget and your crowd tolerance.
