Directory entry with depth, visibility and current details.
Smaller limestone island dive with swim-throughs and reef life.
Smaller limestone island dive with swim-throughs and reef life.
Koh Ngam Noi is the smaller limestone sister of Koh Ngam Yai in Chumphon, and it is usually approached as a boat dive rather than a shore visit. The island's craggy walls, swim-throughs, soft coral patches and scattered reef life make it a strong finish to the nearby wreck route, with the southern side holding the most interesting rock structure and plenty of close-range detail.
Conservative baseline from public research. No community dives logged yet.
Depth range, seasonality, and planning context.
Reported Depth
5m - 16m
Depth Note
Shallow-to-moderate island profile with swim-throughs and coral patches at the southern end.
Best Season
March to September.
Typical Conditions
Boat-access island dive with rocky structure, swim-throughs, coral patches and mixed reef life; current and visibility vary from day to day.
Hazards, restrictions, and access requirements.
Key Hazards
Safety Notes
Use a local operator familiar with the route, keep the rocks in view and plan for changing water movement and visibility.
Access Restrictions
Boat access only through the Chumphon island route and local marine-park rules.
Legal Notes
The site sits within Mu Koh Chumphon National Marine Park.
Community notes to help plan your visit.
Scuba Diving
Boat-access island dive with swim-throughs, coral patches and a broad mix of reef life.
Freediving
Not a primary freedive target; the site is better on scuba.
Snorkeling
The wider park supports snorkeling, but this spot is more rewarding as a scuba route.
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
Directory entry with depth, visibility and current details.
Operator page with park, season and conditions details.
Official tourism page for the Ngam islands and marine-park context.
Know this site? Improve Spot Details.

HTMS Prab 741 is a shallow artificial reef wreck.

Hua Chedi Koh Ngam Yai is a shallow Chumphon check-dive reef.

Boat-access reef in Mu Ko Chumphon with bird-nesting restrictions.

Twin-pinnacle Chumphon site with caves and schooling reef life.

Boat-dived rocky pinnacle off Koh Ngam Noi with black coral.

Boat-accessed Chumphon island with rocky reef and artificial coral.