Haad Sai Daeng
Haad Sai Daeng, which translates roughly to Red Sand Beach, is one of Koh Tao's quieter shorelines, tucked away on the island's eastern side. Unlike the busier western beaches, it offers a more relaxed atmosphere with calm, clear waters and a distinctive reddish-tinged sand that sets it apart from typical tropical beaches. The surrounding coral reef makes it a popular spot for snorkelling, with marine life visible in relatively shallow water close to shore. Visitors can expect a laid-back setting with fewer crowds than Koh Tao's main beaches, making it well suited to those looking for a quieter day out. The beach is modest in size, which contributes to its unhurried feel. The sheltered bay generally offers gentle conditions, making it accessible for casual swimmers as well as snorkellers. Some basic facilities may be available nearby, though the beach retains a natural, undeveloped character. The calmest and clearest water conditions at Haad Sai Daeng tend to occur during the dry season, roughly November through April, when seas around the Gulf of Thailand are at their most settled. Getting there typically requires a short journey from Koh Tao's main pier at Mae Haad, either by taxi, motorbike, or arranged transport. Visitors planning to snorkel should consider bringing their own equipment, as rental options in this part of the island may be limited compared to the busier beach areas.
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Experience hints
Pair your visit. After Haad Sai Daeng, round out your day in Koh Tao with contrasting stops nearby.
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Haad Sai Daeng: Frequently Asked Questions
Is Haad Sai Daeng worth visiting?
Haad Sai Daeng holds a 4.6★ rating from 645 Google reviews, placing it among the highest-rated beaches in Koh Tao.
When is the best time to visit Haad Sai Daeng?
The best months to visit Koh Tao are March – September (calmest water, best visibility), with the most reliable weather. Crowds peak in December – January & July – August — going early in the day usually means fewer people. Months to think twice about: November (monsoon swell peaks).
Where is Haad Sai Daeng located?
Haad Sai Daeng is at เกาะเต่า 84280, Thailand, in Koh Tao. Getting around Koh Tao: Walking around Sairee and Mae Haad; Motorbike rental (฿200–300/day; some concrete roads are extremely steep).
Visitor Information
Best time to visit
March – September (calmest water, best visibility)
Avoid: November (monsoon swell peaks)
Rainy season
October – December
Avg. temperature
25°C – 32°C(77°F – 90°F)
Crowds
Peak: December – January & July – August
Getting there
Lomprayah catamarans connect from Chumphon in about 1.5–2 hours (฿600–700) — the standard route from Bangkok is an overnight bus or train to Chumphon plus the morning boat. Ferries also arrive from Koh Phangan (~1 hr) and Koh Samui (~1.5–2 hrs). No airport.
Getting around
- •Walking around Sairee and Mae Haad
- •Motorbike rental (฿200–300/day; some concrete roads are extremely steep)
- •Longtail and dive-boat taxis to the far bays
Where to stay near Haad Sai Daeng
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Tips for Visiting Beaches
Check Monsoon Windows
Andaman coast beaches (Phuket, Krabi) have rough seas May–October. Gulf beaches (Samui, Hua Hin) are roughest October–December. Plan your beach trip around these windows for calm water and safe swimming.
Go Early for Empty Sand
Even the busiest beaches are nearly deserted before 9 AM. Sunrise walks on Kata, Chaweng, or Railay are magical — and you'll beat the heat for a morning swim.
Use Reef-Safe Sunscreen
Many Thai marine parks ban chemical sunscreens that damage coral. Bring reef-safe (mineral/zinc-based) sunscreen from home — it's harder to find and pricier in Thailand.
Nearby Places

Ao Leuk
A sheltered bay on Koh Tao's east coast, popular for snorkelling and calm, clear waters.

Shark Bay
A quiet natural bay on Koh Samui offering snorkelling, soft corals, sea turtles, and the chance to spot small sharks.

Free beach to shark bay
A scenic coastal trail on Koh Tao connecting a free beach to the calm, sheltered waters of Shark Bay.

Taa Toh Lagoon Beach
A tucked-away lagoon beach in Chalok Baan Kao Bay, offering calm waters and a secluded atmosphere.
Similar Beaches Across Thailand
Patong Beach
Phuket's most famous 3km beach on the Andaman Sea, buzzing with water sports, dining, and nightlife.

Thong Nai Pan
Thong Nai Pan is the pair of horseshoe bays on Koh Phangan's northeast corner that many rate the island's best all-round base — Thong Nai Pan Yai, the larger southern bay with a village feel and family resorts, and Thong Nai Pan Noi, the more polished northern bay where the island's smarte.

Bottle Beach (Haad Khuat)
Bottle Beach (Haad Khuat) on Koh Phangan's north coast is the island's poster child for earned seclusion — a wide crescent of soft sand backed by jungle hills, with no road in.

Freedom Beach
A secluded white-sand beach near Patong with crystal-clear water, far removed from the crowds.
Where to stay near Haad Sai Daeng
Find hotels in Koh Tao on the booking sites travellers trust most.
- Compare prices across sites
- Filter for free cancellation
- Secure checkout on the partner site
Compare rates on Booking.com
Largest selection
Compare rates on Agoda
Asia-focused selection
Compare rates on Hotels.com
Member prices
We may earn a commission from bookings made through these links — at no extra cost to you. Learn more.
Visitor Information
Best time to visit
March – September (calmest water, best visibility)
Avoid: November (monsoon swell peaks)
Rainy season
October – December
Avg. temperature
25°C – 32°C(77°F – 90°F)
Crowds
Peak: December – January & July – August
Getting there
Lomprayah catamarans connect from Chumphon in about 1.5–2 hours (฿600–700) — the standard route from Bangkok is an overnight bus or train to Chumphon plus the morning boat. Ferries also arrive from Koh Phangan (~1 hr) and Koh Samui (~1.5–2 hrs). No airport.
Getting around
- •Walking around Sairee and Mae Haad
- •Motorbike rental (฿200–300/day; some concrete roads are extremely steep)
- •Longtail and dive-boat taxis to the far bays