Prachuap Khiri Khan Province, Thailand

Koung Sai Beach

Koung Sai Beach is a tranquil beach located on the southern part of Koh Chang island. Known for its beautiful nature, the beach features soft, white sand and clear, warm sea water, making it a pleasant spot for swimming. The beach is surrounded by unique natural features such as red limestone that is being beautifully eroded and shaped by the sea, and a mountain covered in cacti.

The beach is also home to several amenities. There are a number of restaurants along the coast where visitors can enjoy food and drinks. For those interested in water sports, kite surfing is a popular activity at Koung Sai Beach.

In addition to its beachfront attractions, Koung Sai Beach offers hiking trails for the more adventurous visitors. These trails lead to the top of a cliff, providing stunning views of the beach and the surrounding area. Another trail leads to a secluded part of the beach, featuring beautiful rock features and fine sand. However, these trails are recommended for those with good physical fitness and appropriate footwear.

Discover accommodation options near Koung Sai Beach and enjoy serene sunsets and the unique red limestone formations.

One of the highlights of a visit to Koung Sai Beach is the opportunity to watch the sunset, which is considered one of the most beautiful on the island. To reach the beach, visitors need to hike for about 25 minutes from the south end of Khao Kalok.

What to do at Koung Sai Beach?

Restaurants

You can enjoy one of the restaurants at the beach while soaking up the sun.

Visitor Reviews

Visitor reviews highlight the natural beauty and tranquility of the beach, with its white soft sand, clear warm water, and stunning sunsets being particularly appreciated. The beach's unique features such as the red limestone and cacti-covered mountain, as well as the adventurous hiking trails and kite surfing opportunities, are also highly praised. However, some visitors warn that the trails can be challenging and potentially unsafe, and the beach may not be the best choice for those seeking relaxation.

Where to Stay near Koung Sai Beach?

Visitors to Koung Sai Beach often stay in nearby towns such as Prachuap Khiri Khan or Pranburi, where they can find a range of accommodation options. While some come specifically for the beach's natural beauty and activities, others include it as part of a broader exploration of the area's coastal attractions.

The following map shows available accommodations and their prices. See the full list of accommodation options here.

Where is Koung Sai Beach?

Latitude: 12.3352035 / Longitude: 100.0007618

Koung Sai Beach is located in Prachuap Khiri Khan Province. The following map of Koung Sai Beach shows the exact location.

Koung Sai Beach: Weather Today

📅 Sunday, June 21, 2026
Today is a poor day for visiting Koung Sai Beach, and I strongly advise against planning any coastal activities. Significant thunderstorms are expected throughout the day, bringing the risk of hail and volatile conditions that make staying outdoors dangerous. With a maximum air temperature of 32.6 °C and a UV Index of 8.8, the sun remains intense during breaks in the clouds, but the frequent storms and heavy rain will quickly ruin any plans for relaxing on the sand. While the sea temperature is 31.6 °C and the water is generally calm, it is not safe to enter the water while lightning or storms are in the area. Please prioritize your safety and stay indoors until these weather hazards have completely passed.
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Air

Low / High25.7°C/32.6°C
Feels Like (High)40.6°C
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Sea

Sea Temperature31.6 °C
Wave Height0.2 m
🌧️

Rain

Rain Chance92%
Rainfall8.2 mm
Rain Duration6 h
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Sun

Sunrise / Sunset05:56/18:47
Sunshine Hours12.3 hrs
UV Index8.8
Cloud Cover72%
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Wind

Speed15.1 km/h
Gusts32.4 km/h
DirectionSW

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