

Best for advanced divers, 5-35m, boat entry, strong current.
Northern Rocky is a remote site in the Mergui Archipelago featuring a combination of reef, wall, and drift diving. The topography spans depths of 5 to 35 metres, with an average depth of 20 metres. Due to strong currents and potential surge, this site is strictly for advanced divers. Visibility varies between 5 and 20 metres. Access is exclusively by boat, and divers must be prepared for shifting water movement. Water temperatures remain consistent between 27 and 30 degrees Celsius throughout the year. Night diving is permitted, though the site lacks any surface facilities, requiring all equipment and safety protocols to be managed via the support vessel.
9.88580, 97.96220
Current direction and strength at Northern Rocky can shift with little warning, so agree on abort signals and a bail-out plan with your divemaster before entering the water. Facilities are non-existent on site, so confirm all equipment, nitrox availability, and emergency oxygen with your vessel before departure.
Access is by boat.
Recorded at this site
Depth
5-35m
Visibility
5-20m
Skill Level
Advanced
Entry
Boat
Boat required
Water Temp
27-30°C
Current
Strong
Best Time
Apr
No, this site requires advanced certification due to strong currents, surge, and variable visibility.
The site ranges from 5 to 35 metres in depth, with an average depth of 20 metres.
Northern Rocky is a boat-only site located 60 kilometres from shore, accessible via liveaboard or private charter.
Snorkelling is not recommended due to the strong currents and the advanced nature of the site.
Divers should be aware of strong currents, surge, and low visibility. Protective footwear is recommended to avoid injury from sharp coral and rocks.
Diving at Northern Rocky in Mergui Archipelago requires the following certifications: Advanced. Always dive within your training limits.
A rashguard or 2mm shorty is recommended for diving at Northern Rocky in Mergui Archipelago. Water temperatures range from 27°C to 30°C.
The best months to visit Northern Rocky in Mergui Archipelago are April. Conditions outside these months can still be good but are less predictable.
Northern Rocky in Mergui Archipelago can have strong currents. Advanced experience with drift diving and current navigation is recommended.
Visibility at Northern Rocky in Mergui Archipelago typically ranges from 5 metres to 20 metres. Conditions vary with weather, tides, and seasons.