Best Beaches in Koh Tao — Snorkelling, Diving & Quiet Romantic Bays

Koh Tao is known worldwide for diving — but even if you never touch a scuba tank, the island’s bays, viewpoints and snorkelling spots make it one of Thailand’s most charming stops. This guide helps you choose between Sairee, Shark Bay, Sai Daeng, Ao Leuk, Tanote Bay and Koh Nang Yuan.

Most people either stay along Sairee Beach (for sunset and social life) or in quieter bays in the south and east (for snorkelling and calm). Koh Nang Yuan is usually a day-trip highlight.

Main Beach & Bay Areas in Koh Tao

Here’s a quick map in words of the island’s main beach zones:

Sairee Beach – Sunset, Walkable & Social

Sairee is where many travellers first imagine Koh Tao — a long stretch of sand, palm trees, sunset views and a line of small bars and restaurants by the water. It’s easy to walk around, meet other travellers and organise diving courses or snorkel tours.

• Best for: solo travellers, friends, younger couples, anyone who likes a social beach town feel.
• Tip: if you want quieter nights, look at stays slightly away from the liveliest bar clusters.

Shark Bay & Sai Daeng – Turquoise Water & Snorkelling

On the south side of Koh Tao, Shark Bay and Sai Daeng feel more tucked away. Water can be beautifully turquoise on clear days, and some visitors spot turtles and harmless reef sharks swimming below.

• Best for: couples, photography, snorkelling from the shore.
• Note: always respect marine life and don’t chase or touch animals.

Ao Leuk – Calm, Clear & Relaxed

Ao Leuk is a small, sheltered bay that often feels quieter than Sairee. It’s a good choice for travellers who want to swim, snorkel and spend long hours on a smaller, calmer beach.

• Best for: relaxed beach days, beginner snorkellers and couples who prefer calm over crowds.

Tanote Bay – More Dramatic for Confident Swimmers

Tanote Bay has a more rugged, dramatic coastline — rocks, deeper water and reef areas. It’s popular with those who are confident in the sea and like swimming over deeper patches.

• Best for: strong swimmers, snorkellers and travellers who like a less polished, more natural bay.

Koh Nang Yuan – The Classic Viewpoint Shot

Koh Nang Yuan is a tiny island connected by sandbars, just off Koh Tao. From the main viewpoint you can see the sandbar, bays and sea colours that appear in many Thailand posters.

• Best for: half-day trips, photos and a different perspective of the area.
• Tip: go earlier in the morning for softer light and fewer crowds if possible.

Where to Stay in Koh Tao (By Traveller Type)

Use this as a simple way to choose your Samui base, depending on what you care about most:

Best Time to Visit Koh Tao

Koh Tao’s weather can shift month by month, but this is a helpful simple guide:

• December – April: often good for beach days and diving, with a lot of visitors coming in from the rest of Thailand.
• May – September: still active diving season; conditions can be great but there may be some windier or rainy days.
• October – November: can see heavier rain at times; good deals for flexible travellers, but check conditions if diving is your main reason for coming.

Practical Tips for Koh Tao & Snorkelling

• Use reef-safe sunscreen and avoid standing on coral while snorkelling.
• If you’re not a strong swimmer, use a life jacket for snorkelling trips and stay close to your guide.
• Many people rent scooters on Koh Tao — only do this if you’re confident and comfortable with hills and small roads.
• Book diving with a reputable school that keeps group sizes reasonable and respects safety and marine-life rules.