Mao Bay is one of Koh Tao's hidden bays, preserving its natural beauty. Located on the east coast, it features a coastline adorned with large boulders interspersed with small beaches and dense forests. The seawater boasts shades ranging from clear blue to deep blue depending on the depth, creating a tranquil atmosphere perfect for relaxation.

The Charm of Seclusion: Mao Bay best reflects Koh Tao's past. The shoreline is filled with large rocks and dense forests. The seawater is a deep blue mixed with turquoise, a result of its clear, deep waters. It is the perfect place to rejuvenate amidst the sound of waves and sea breeze.

An Underwater World to Explore: For scuba divers, Mao Bay is a must-visit destination. The sinking of the HTMS Hanhak Sattru has quickly created a large marine habitat. The reefs surrounding the bay also offer stunning displays of soft corals with vibrant colors.

A Challenge for Adventurers: Getting to Mao Bay requires a spirit of adventure. If not by longtail boat, hiking through the jungle tests your endurance, rewarded with the satisfaction and unique views of a hidden bay few get to see.

The highlight of this bay is the HTMS Hanhak Sattru wreck diving spot, sunk in 2022 to create an artificial reef. The ship rests at a depth of approximately 18–30 meters, suitable for advanced divers and above. The ship's structure has become a habitat for marine life, such as groupers, barracuda, batfish, and benthic animals, with opportunities to spot blacktip reef sharks and sea turtles.

The area around the bay also features soft and hard corals in good condition, with an average underwater visibility of approximately 15–25 meters in good conditions. Currents can be strong at times, so check sea conditions before diving.

For adventure seekers, the Jungle Trail from Sairee Beach takes approximately 1.5–2.5 hours to hike. The trail is steep and lacks clear signage, so use GPS or hire a guide.

Mao Bay is also suitable for Low Impact Tourism, as there are no facilities. Tourists should avoid touching corals and help maintain the natural environment.

Mao Bay is ideal for scuba divers, hikers, and those looking to experience an unseen side of Koh Tao that remains raw and truly tranquil.

• By Boat (Highly Recommended): Hire a longtail boat from Mae Haad Pier or Sairee Beach. The journey takes approximately 20–30 minutes (depending on sea conditions on the east coast).

• On Foot: Start from the trailhead behind Sairee Beach heading east. The trail is steep and overgrown (wear sneakers and be physically prepared).

• Be Prepared: Bring your own drinking water, food, and trash bags, as there are no shops.

• Plan Your Dive: If you want to dive the wreck, contact a dive center in advance and have a guide.

• Safety First: If hiking, start early and return before 4:00 PM.

• Check the Weather: Check wind and wave conditions on the east coast before traveling.

• Protect Nature: Avoid touching corals and take all trash back with you.

Admission Fee:

• Free admission (no area entrance fees)

Opening Hours:

• Open 24 hours (recommended 08:00 – 16:30 for safety)