Before it on the ring road
Plai Laem Beach
1.1 km south-west of Thongson Bay Beach
Plai Laem Beach on Koh Samui's northeast coast is ~2 km of shallow, rocky water beside Wat Plai Laem and Big Buddha.
Right now
Month by month
Pick a month. The water, the swim call, the crowds and the sun all follow your pick, here and further down the page.
CalmChoppyRough Rain
Swim January
Good swimming water
Calm sea on this coast this month. Swim within your depth: there is no lifeguard on most Samui beaches.
North coast Sea 28 °C Sunrise 06:40 Calm
Swim February
Good swimming water
Calm sea on this coast this month. Swim within your depth: there is no lifeguard on most Samui beaches.
North coast Sea 28.5 °C Sunrise 06:39 Calm
Swim March
Good swimming water
Calm sea on this coast this month. Swim within your depth: there is no lifeguard on most Samui beaches.
North coast Sea 29 °C Sunrise 06:27 Calm
Swim April
Good swimming water
Calm sea on this coast this month. Swim within your depth: there is no lifeguard on most Samui beaches.
North coast Sea 30 °C Sunrise 06:10 Calm
Swim May
Good swimming water
Calm sea on this coast this month. Swim within your depth: there is no lifeguard on most Samui beaches.
North coast Sea 30 °C Sunrise 05:59 Calm
Swim June
Good swimming water
Calm sea on this coast this month. Swim within your depth: there is no lifeguard on most Samui beaches.
North coast Sea 30 °C Sunrise 05:59 Calm
Swim July
Good swimming water
Calm sea on this coast this month. Swim within your depth: there is no lifeguard on most Samui beaches.
North coast Sea 29.5 °C Sunrise 06:07 Calm
Swim August
Good swimming water
Calm sea on this coast this month. Swim within your depth: there is no lifeguard on most Samui beaches.
North coast Sea 29.5 °C Sunrise 06:11 Calm
Stay out September
Stay on the sand
Rough water on this coast this month. Watch the flags and keep out of the waves.
North coast Sea 29 °C Sunrise 06:09 Rough
Stay out October
Stay on the sand
Rough water on this coast this month. Watch the flags and keep out of the waves.
North coast Sea 29 °C Sunrise 06:07 Rough
Stay out November
Stay on the sand
Rough water on this coast this month. Watch the flags and keep out of the waves.
North coast Sea 29 °C Sunrise 06:14 Rough
Dip December
A short dip in choppy water
The sea on this coast turns choppy this month and the shallows can go murky. Stay in your depth.
North coast Sea 28.5 °C Sunrise 06:28 Choppy
Swim
Year-round
Enough depth to swim close to shore in every month of the year.
Snorkel
Sea
CalmCalmCalmCalmCalmCalmCalmCalmRoughRoughRoughChoppy
28 °C water, 125 mm of rain on 8 days.28.5 °C water, 65 mm of rain on 4 days.29 °C water, 115 mm of rain on 5 days.30 °C water, 85 mm of rain on 6 days.30 °C water, 130 mm of rain on 11 days.30 °C water, 135 mm of rain on 10 days.29.5 °C water, 115 mm of rain on 11 days.29.5 °C water, 100 mm of rain on 10 days.29 °C water, 120 mm of rain on 11 days.29 °C water, 295 mm of rain on 16 days.29 °C water, 445 mm of rain on 16 days.28.5 °C water, 265 mm of rain on 12 days.
Calm January to August
Sand
Pale, fine
Soft, fine sand underfoot, easy on bare feet.
Wide flats at low tide
Crowds
Almost no one
Peak season on the island: more people on every beach.Peak season on the island: more people on every beach.Shoulder season: a steady trickle of visitors.Shoulder season: a steady trickle of visitors.Low season island-wide. You may have long stretches to yourself.Low season island-wide. You may have long stretches to yourself.Shoulder season: a steady trickle of visitors.Shoulder season: a steady trickle of visitors.Low season island-wide. You may have long stretches to yourself.Low season island-wide. You may have long stretches to yourself.Low season island-wide. You may have long stretches to yourself.Peak season on the island: more people on every beach.
Island busy this month
Sunrise
06:4006:3906:2706:1005:5905:5906:0706:1106:0906:0706:1406:28
Comes up behind the island's own hills, about 0.3 km away: light first, sun later.Comes up behind the island's own hills, about 0.4 km away: light first, sun later.Comes up behind the island's own hills, about 0.5 km away: light first, sun later.Comes up straight out of open water.Comes up straight out of open water.Comes up straight out of open water.Comes up straight out of open water.Comes up straight out of open water.Comes up behind the island's own hills, about 0.5 km away: light first, sun later.Comes up behind the island's own hills, about 0.5 km away: light first, sun later.Comes up behind the island's own hills, about 0.3 km away: light first, sun later.Comes up behind the island's own hills, about 0.3 km away: light first, sun later.
Kids
3 of 3
Calm, shallow and easy: one of the island's best for small children.
Kids rating
Food
2 places
Melati Beach Resort & Spa, Nantra Thongson Bay Resort & Villas
Resort prices
After dark
Nothing
No bars and no lights. For a night out, head to Chaweng or Bophut.
Nightlife rating
The story
12 min read
Key facts
Thongson Bay beach is a calm, shallow cove of about 500 m on the north coast of Koh Samui, roughly 5 km (15 minutes by car) from the airport. It has soft sand, clear water, shore-entry coral at the eastern rocks, free parking for about 10 cars and one simple beach restaurant. That makes it a place for a quiet swim or an easy snorkel, not a full beach day with sunbed rental and bars. It stays quiet even in high season because the access road is easy to miss, and that alone makes it one of the island’s most rewarding hidden-gem beaches.
The bay sits between the busier northeast coast around Choeng Mon and the northern shore near Bophut, facing out toward Koh Phangan across the strait. A handful of boutique resorts (most notably Melati Beach Resort & Spa) and a family-run bungalow place occupy the shoreline, but the sand is public and a small free car park serves day visitors.
Like much of Koh Samui’s northern coast, Thongson Bay (หาดทองสน) was coconut land before tourism reached the shoreline. Development came late and lightly compared to Chaweng or even Choeng Mon: small bungalow operations opened first, followed by boutique resorts including Melati Beach Resort & Spa and Nantra Thongson Bay Resort & Villas.
Because the access road runs off a minor turn from the ring road rather than a main junction, the bay never saw the large-scale hotel construction that transformed nearby beaches. It is often mentioned alongside neighboring Samrong Bay, a similarly quiet cove one headland away, and visitors at either bay’s resorts sometimes kayak the short stretch between them.
Thongson Bay divides roughly into three parts along its ~500 m length: an open sandy central section, a rocky stretch to the east, and (beyond that) a smaller hidden cove accessible only by crossing the rocks or paddling around them.
The main swimming beach is soft sand with a gentle slope into the water. At low tide the water can be knee-deep as far as ~50 m offshore in places, which makes it a natural, safe paddling area for young children. Before low tide the entry is relatively stone-free, and confident swimmers can comfortably swim 30 m or more without touching the bottom. Large waves are rare here: the bay’s position, wrapped by headlands on both sides, keeps the water flat on all but the roughest monsoon days.
At the eastern end, around 250 m of low rocky terrain marks the transition toward the hidden cove. Coral patches sit just offshore here, close enough to reach on a short snorkel from the sand. This is the best spot on the bay for casual snorkeling: no boat required, though water shoes help on the rocks.
Beyond the rocks lies a small, largely private stretch of sand cut off from the main beach: reachable by crossing roughly 100 m (~300 feet) of rocky shoreline. The rocks are not especially slippery, but sturdy sandals are worth bringing. Because access takes a bit of effort, this pocket of beach is usually empty even when Thongson’s main sand has a few visitors.
Thongson Bay is built for slow days on the water rather than adrenaline sports, and that is exactly its appeal.
For anyone chasing more serious reef diving, full-day snorkeling and diving trips to Koh Tao or Ang Thong National Marine Park typically run 1,500-2,500 THB (~43-71 USD) and can be booked through operators in nearby Bophut or Choeng Mon.
There is one simple beach restaurant on the sand, Thongson Bay Restaurant, attached to the family-run bungalows next to it. Reviews describe Thai and Western dishes, breakfast and cocktails at modest prices (rated 3.8 of 5 on Tripadvisor, so expect casual rather than polished). Melati Beach Resort & Spa runs its own beachfront dining for a bigger budget. Beyond that, dining is limited by design: this is a quiet resort bay, not a beach-bar strip. Opening hours are not published reliably, so confirm locally.
| Option | Type | Price Range | Known For |
|---|---|---|---|
| Thongson Bay Restaurant | Thai, Western, breakfast | $-$$ | Casual tables on the sand, cocktails, bungalows next door |
| Melati Beach Resort & Spa restaurants | Thai, international, seafood | $$-$$$ | Beachfront tables, cocktails, sea views |
| Small local shop | Snacks, drinks | $ | Basic supplies, ~0.5 km from the sand |
| Bophut / Fisherman’s Village restaurants | Thai, seafood, international | $-$$$ | Wide choice, 10 min drive |
| Choeng Mon beachfront dining | Thai, seafood | $$-$$$ | Sunset tables, short drive south |
For a bigger selection of restaurants, cafes, and bars, most visitors drive 10 minutes to Bophut’s Fisherman’s Village or a similar distance south to Choeng Mon Beach, both of which have far denser dining scenes than Thongson Bay itself.
Thongson Bay’s position on the northeast tip puts several of Samui’s best-known landmarks within a short drive.
Accommodation on Thongson Bay is boutique and low-density, with no large hotel strip, which is part of why the beach stays quiet. Bungalows with a restaurant on the sand are the budget end; boutique resorts and villas sit above them. Rates below are rough listing ranges, so check current prices (as of 2026, they swing with season).
| Category | Typical price per night | Examples |
|---|---|---|
| Beach bungalows | Lowest on the bay (listings vary; ask the owner) | Thongson Bay Bungalow & Restaurant |
| Upscale/boutique | 4,200-7,700 THB (~120-220 USD) | Nantra Thongson Bay Resort & Villas |
| Luxury | 10,500-21,000 THB (~300-600 USD) | Melati Beach Resort & Spa |
| Nearby alternatives | 1,050-8,750 THB (~30-250 USD) | Budget-to-luxury options 10-15 min away in Bophut or Choeng Mon |
Staying on the bay means near-empty beach access every morning; staying in Bophut or Choeng Mon trades that seclusion for more restaurants, shops, and nightlife within walking distance. Resort sunbeds are for guests, and there is no public sunbed rental, so bring a towel and a hat.
Thongson Bay is on the north coast, at about 9.587 N, 100.074 E (search “Thongson Bay” or “Thongson Beach” in Google Maps), between the Big Buddha arch and the Choeng Mon turn-off. The entrance is easy to miss from the ring road, so navigate by the arch and the signs to Melati Beach Resort & Spa.
Thongson Bay is roughly 5 km from the airport, about 15 minutes by car.
From the ring road, take the turn marked by the arch above the road leading to Big Buddha, then continue past the Family Market roughly 500 m before turning off toward Melati Beach Resort & Spa. The beach’s small public car park (about 10 vehicles, free) sits just past the resort turn-off. The road is paved and manageable by scooter or car, though it narrows near the end.
A rented scooter (200-300 THB/day, ~6-9 USD) is the most flexible way to combine Thongson Bay with Big Buddha, Wat Plai Laem, and Choeng Mon in a single loop. A car or taxi is more comfortable for families or anyone carrying snorkeling gear.
| Season | Months | Conditions | Rating |
|---|---|---|---|
| Peak / Dry | Dec - Feb | Sunny, clearest water, calm seas | |
| Hot | Mar - May | Hot (35°C+), generally dry, good visibility | |
| Inter-monsoon | Jun - Aug | Mixed weather, still mostly swimmable | |
| Monsoon | Sep - mid-Nov | Rain more likely, occasional rough seas |
Water clarity is best from December through April, which is also the best window for snorkeling around the eastern rocks. Because Thongson Bay is sheltered by headlands on both sides, it often stays calmer than more exposed east-coast beaches during shoulder-season winds, though visitors should still check local conditions before swimming out past the shallows during the September-November monsoon window.
| Traveler Type | Fit | Why |
|---|---|---|
| Couples | Quiet, uncrowded sand and boutique resorts built for privacy | |
| Snorkelers | Coral patches at the eastern rocks, no boat required | |
| Families with young kids | Shallow, gently sloping water; natural paddling pool at low tide | |
| Kayakers | Sheltered paddle to Samrong Bay’s hidden coves | |
| Budget travelers | Few budget rooms directly on the bay; better value nearby in Bophut | |
| Nightlife seekers | No bars or clubs on-site: Chaweng is 25-30 minutes away |
Yes. Thongson Bay has coral patches near the rocky headland at its eastern end, reachable from the sand without a boat. Visibility is best from December to April. It is a casual, shore-entry snorkeling spot rather than a dedicated reef dive site: for deeper reefs, day trips to Koh Tao or Ang Thong Marine Park go further.
Take the turn near the arch on the road to Big Buddha, pass the Family Market after about 500 m, then follow signs toward Melati Beach Resort & Spa. There is free shaded parking for around 10 cars near the beach access. It is about 15 minutes (~5 km) from Samui International Airport by taxi or scooter.
No, Thongson Bay is one of Koh Samui’s quieter beaches, largely because the access road is easy to miss and the shoreline is fronted mostly by low-density boutique resorts rather than large hotels. Even in high season it rarely feels busy compared to Chaweng or Choeng Mon.
Generally yes. The sand slopes gently and the water can stay knee-deep for a good distance offshore at low tide, creating a natural paddling area. There is no dangerous current or offshore reef break reported, but adults should still supervise children near the rocky eastern section.
Thongson Bay is smaller, quieter, and more secluded, with better casual snorkeling at its eastern rocks. Choeng Mon, a short drive south, is larger with more restaurants, resorts, and beach activity. Travelers wanting solitude and coral snorkeling should choose Thongson Bay; those wanting more amenities should pick Choeng Mon.
Yes. Thongson Bay Restaurant sits on the sand beside the family-run bungalows and serves Thai and Western dishes, breakfast and cocktails. Melati Beach Resort & Spa has beachfront dining too. Hours are not published reliably, so confirm locally. For more choice, Fisherman’s Village in Bophut is about 10 minutes away.
No. Thailand has no official nudist beach, and public nudity is illegal (fines up to 5,000 THB). Thongson Bay is a family-friendly resort bay, and the resorts and bungalows front the sand, so keep swimwear on.
There is a small free car park for about 10 vehicles just past the Melati Beach Resort turn-off, near the beach entrance. It fills up on weekends, so arrive early. Scooters fit easily, and the road is paved but narrows near the end.
Nearby
What is near
The nearest temples, waterfalls, hikes and beaches, each with the straight-line distance and direction. Point at a name to find its pin.
Getting hereStraight-line distances to the places most visitors come from.
Sunrise
From the sand
Thongson Bay Beach looks north-east. Pick a month to see where the sun meets the horizon, and what stands in front of it.
06:40January06:39February06:27March06:10April05:59May05:59June06:07July06:11August06:09September06:07October06:14November06:28December
Sun bearing from the middle of the beach, computed from its coordinates and the coastline outlines, mid-month.
This coast
Along the ring road
Thongson Bay Beach is No. 13 of 34 round the ring road. Next door: Plai Laem Beach one way, Samrong Beach the other.
Before it on the ring road
1.1 km south-west of Thongson Bay Beach
Plai Laem Beach on Koh Samui's northeast coast is ~2 km of shallow, rocky water beside Wat Plai Laem and Big Buddha.
After it on the ring road
0.5 km north-west of Thongson Bay Beach
Samrong Beach (Samrong Bay) on Koh Samui's northeast tip: a ~200 m public cove beside Six Senses, 5 km from the airport.