Operator page describing the tunnel-like reef and macro life.
Koh Mae Urai/ เกาะแม่อุไร is a boat dive for macro life in Krabi.
Koh Mae Urai/ เกาะแม่อุไร is a boat dive for macro life in Krabi.
Koh Mae Urai is a Krabi local-islands reef built around two shallow swim-throughs, rocky walls, and coral shelves on a limestone outcrop. The site is known for macro life first: nudibranchs, pipefish, seahorses, shrimp, crabs, and schooling reef fish, with larger visitors like blacktip reef sharks and barracuda on better-visibility days. It is a boat dive that works well as part of a guided Ao Nang trip.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
Up to 20m
Depth Note
Shallow swim-through reef with depths to about 20 m.
Best Season
Year-round when local-islands trips are running, with calmer seas preferred.
Typical Conditions
Rocky reef and wall sections with shallow swim-throughs, variable visibility, and weak-to-moderate current.
Site conditions, restrictions, and access requirements.
Site Conditions
Safety Notes
Treat swim-throughs as overhead environments, keep a cautious line near rockfall-marked areas, and use surface signalling on boat days.
Access Restrictions
Treat Koh Mae Urai/ เกาะแม่อุไร as a boat-access reef; some operators make it a secondary stop on a Krabi island trip rather than a main destination.
Legal Notes
Follow operator briefings and any local exclusion signage around unstable or closed rock sections.
Community notes to help plan your visit.
Scuba Diving
Best as a guided boat dive for certified divers who like macro hunting, coral detail, and occasional swim-throughs.
Freediving
Not a freedive-first site; the reef structure, swim-throughs, and boat-trip logistics suit scuba better.
Snorkeling
Snorkelling is secondary; the site is more rewarding underwater where the reef, walls, and macro life sit.
Species commonly reported at this site, with direct links into their wildlife guides.
Community dive logs and visit reports for this site.
Average conditions based on logged dives & visits.
Planning answers for access, conditions, timing, and site logistics.
Last Updated
Research Sources
Operator page describing the tunnel-like reef and macro life.
Krabi dive-location page with visibility, current, and skill-level guidance.
Trip listing mentioning Koh Mae Urai with minimal current and small groups.
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