Koh Sak
เกาะสาก
Horseshoe Island
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
8 Sep
9 Sep
10 Sep
11 Sep
12 Sep
13 Sep
14 Sep
Marine Life
Notable Features
- • Horseshoe shape creates sheltered bay
- • Macro photography
- • Deep outer walls
Best Time to Visit
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.
Tips
Inner bay for beginners, outer wall for advanced. The west side drops deepest.
Experience Required
All levels depending on area.
Location
GPS: 12.9300°N, 100.7900°E
Learn to Freedive in the Gulf of Thailand
Sites like Koh Sak are what the Gulf has to offer. Get certified with us on Koh Samui — train at Sail Rock and Koh Tao in groups of no more than 3, skip the Koh Tao ferry, and dive the best of the region.
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