Jansom Bay
About Jansom Bay
Jansom Bay is a dive site on the western side of Nan Yuan Island near Koh Tao. Its position in the island’s lee can create calmer water for diving when conditions are rough on the eastern side. The sandy areas host gobies, and the reef features healthy coral with abundant fish life. Divers may also see schools of fish, barracuda, and turtles.
Where Is Jansom Bay?
Jansom Bay Planning Details
Depth range, seasonality, and planning context.
Typical Conditions
Often sheltered and calm due to being in the shadow of the island, including when rougher ocean conditions affect the east side.
Local Intel For Jansom Bay
Community notes to help plan your visit.
Scuba
Generally described as calm when sheltered by the island, making it suitable for diving.
Jansom Bay Dive Conditions Planner
Use the planner to scan this week, inspect today in local time, and understand how exposure shapes conditions at Jansom Bay.
Exposure Profile at Jansom Bay
Directional shelter context for incoming swell.
Recent Logged Visits At Jansom Bay
Community dive logs and visit reports for this site.
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Dive Spot Log Averages At Jansom Bay
Average conditions based on logged dives & visits.
Jansom Bay Guide - Sources and Updates
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