Koh Sak

เกาะสาก

Horseshoe Island

Beginner Good Now

A horseshoe-shaped island with a sheltered bay and reef slopes dropping to 30m on the outer walls.

Depth Range

3–30m

Site Type

reef

Pattaya & Sattahip

Visibility

5–15m

26–30°C

Getting There

30 min boat from Pattaya

Near Koh Larn

Marine Life

Reef Fish Nudibranchs Moray Eels Seahorses

Notable Features

• Horseshoe shape creates sheltered bay
• Macro photography
• Deep outer walls

Best Time to Visit

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Peak Good Now

About Koh Sak

Koh Sak is a small, crescent-shaped island near Koh Larn. The horseshoe shape creates a sheltered inner bay perfect for beginners, while the outer walls drop steeply to 30m for more experienced divers. The sheltered inner reef is home to seahorses and nudibranchs, making it a macro photography destination.