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National park status and destination context for Koh Rok.
Dive Spot Guide•
Lak Siam
Shallow coral slope and fire-coral gardens on Koh Rok Noi.
Local operator required
Trips are guided from Koh Lanta and depend on weather, sea state, currents, and minimum numbers.
Boat trip from Koh Lanta to a seasonal, all-levels reef with mild-to-medium currents and strong snorkel/scuba value.
About Lak Siam
Lak Siam is a boat-accessed Koh Rok Noi reef with shallow fire-coral gardens, a broad sloping coral face, and a rich fish life. Turtles, moray eels, groupers, snapper, and other reef species are common, and the shallow sections also work well for snorkeling. Trips are seasonal and weather-dependent, so calm water and light current make the site easiest to enjoy.
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Research Estimate At Lak Siam
Conservative baseline from public research. No community dives logged yet.
VisibilityVisibility: 20m
AccessModerate entry effort
CoralPristine, vibrant coral
Aquatic LifeExceptional variety
FacilitiesBasic facilities
Crowd / PopularityFew visitors
CurrentLight current
Where Is Lak Siam?
Community sourced coordinates.
Lak Siam Planning Details
Depth range, seasonality, and planning context.
Reported Depth
1m - 18m
Depth Note
Shallow fire-coral gardens and a broad sloping reef run from about 1 m to roughly 18 m+, with some surrounding areas dropping deeper.
Best Season
Mid-October to mid-May; Koh Rok trips are typically paused during monsoon months.
Typical Conditions
Shallow coral slope, clear water, and mild-to-medium currents that can shift with weather and tides.
Safety & Access At Lak Siam
Site conditions, restrictions, and access requirements.
Site Conditions
Sharp coral
Safety Notes
Fire coral and reef structure call for good buoyancy and careful finning.
Access Restrictions
Boat access, seasonal closure, and a minimum Open Water certification for scuba trips are the practical defaults.
Legal Notes
Mu Ko Lanta National Park rules and marine park fees apply.
Local Intel For Lak Siam
Community notes to help plan your visit.
Scuba Diving
Good for open-water and above divers who like a shallow coral slope, dense reef life, and easy buoyancy practice.
Freediving
Shallow coral gardens can work for freediving in calm conditions, but the site is mainly used for snorkel and scuba day trips.
Snorkeling
Very good on the shallow fire-coral gardens and reef slope when currents are light.
Wildlife at Lak Siam
Species commonly reported at this site, with direct links into their wildlife guides.
Recent Logged Visits At Lak Siam
Community dive logs and visit reports for this site.
Dive Spot Log Averages At Lak Siam
Average conditions based on logged dives & visits.
Conditions
Avg. Visibility20m
Activity
No dive activity logged yet.
