Best for advanced divers, 15-80m, boat entry, mild current.
Greg's Wall is a deep-water site off the coast of Madagascar, featuring a complex topography of a wall, pinnacle, and cave. The structure begins at 15 metres and descends to 80 metres, with an average depth of 35 metres. Due to the significant depth and overhead cave environment, this site is strictly for advanced, deep-certified divers. Access is by boat only, located 80 kilometres from shore. Divers should expect mild currents and visibility ranging from 10 to 30 metres. Careful gas management and buoyancy control are essential to navigate the wall and cave safely while mitigating risks associated with nitrogen narcosis and decompression.
-14.11393, 47.66143
Plan your dive profile conservatively before descending: the wall drops hard to 80 metres and it is easy to exceed your planned depth while following the structure. Confirm cave penetration protocols with your guide before entry, as the overhead environment adds risk if your team is not properly equipped and briefed.
Boat access required; pickups typically occur at the northern end of the wall.
Recorded at this site
Depth
15-80m
Visibility
10-30m
Skill Level
Advanced
Entry
Boat
Boat required
Water Temp
26-30°C
Current
Mild
Typical Dive
45 min
Best Time
Jun, Jul, Aug
No nearby dive sites found within 50km.
No, this site is intended for advanced and deep-certified divers due to the significant depths and overhead cave environment.
The site ranges from 15 to 80 metres, with an average depth of 35 metres.
Greg's Wall is a boat-access site located 80 kilometres from the shore.
No, this site is not suitable for snorkelling as the primary features and structures are located at significant depths.
Hazards include decompression, nitrogen narcosis, deep water, strong currents, and the risks associated with an overhead cave environment.
Diving at Greg's Wall in Nosy Be requires the following certifications: Advanced, Deep. Always dive within your training limits.
A rashguard or 2mm shorty is recommended for diving at Greg's Wall in Nosy Be. Water temperatures range from 26°C to 30°C.
The best months to visit Greg's Wall in Nosy Be are June, July, and August. Conditions outside these months can still be good but are less predictable.
Greg's Wall in Nosy Be typically has mild currents that most divers can handle comfortably.
Visibility at Greg's Wall in Nosy Be typically ranges from 10 metres to 30 metres. Conditions vary with weather, tides, and seasons.
