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Nearby Three Rocks / Pottery depth range, ordinary visibility, hard coral, and reef life support the shallow-pinnacle baseline.
Sheltered Koh Tao bay with easy shore snorkeling and calm reef life.
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Jansom Bay is a sheltered west-side bay on Koh Tao with a shallow sandy beach, easy shore access, and reef structure just offshore. It is best known for relaxed snorkeling and beginner-friendly diving in calm water, with the most interesting life on the reef edge and nearby pinnacles rather than in the sandy center.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
1m - 12m
Depth Note
The bay is shallow enough to swim and snorkel at low tide, while the offshore Three Rocks / Pottery area is reported around 3-12m and Three Rocks itself around 8-9m max.
Best Season
Year-round; especially useful when exposed east-side sites are rough.
Typical Conditions
Usually sheltered and calm, with shallow water that remains swim-friendly at low tide and light current along the bay front.
Hazards, restrictions, and access requirements.
Key Hazards
Access Restrictions
Private property; non-guests usually pay a 200 baht entry fee, and snorkeling fins are not allowed.
Legal Notes
Follow posted resort access rules and private-beach restrictions.
Community notes to help plan your visit.
Scuba Diving
Relaxed shore and reef diving with the best action on the outer reef edge and the nearby Three Rocks area.
Freediving
The shallow sheltered water can work for relaxed apnea practice near the beach, but the site is more naturally a snorkel and easy scuba spot.
Snorkeling
The shallow bay is one of the easiest snorkel entries on Koh Tao, especially along the reef edge; snorkeling fins are not allowed.
Chill / Non-diver
Good for calm-water swim time, lingering on the beach, and a low-effort in-and-out session between dives.
Use the planner to scan this week, inspect today in local time, and understand how exposure shapes conditions at Jansom Bay.
Directional shelter context for incoming swell.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
No Dive Logs Yet
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Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Nearby Three Rocks / Pottery depth range, ordinary visibility, hard coral, and reef life support the shallow-pinnacle baseline.
Private-bay access, 200 baht entry, snorkeling suitability, no-fins rule, and the marine-life mix around Jansom Bay.
10-minute walk from Mae Haad, coral close to shore, green turtles, reef fish, and private-bay access with a fee.
Calm and shallow conditions, year-round use, weekend crowding, deckchairs, moored dive boats, and the flipper ban.
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Shallow Mae Haad Bay pinnacles with easy pier access.
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