Depth, current, visibility and required level are indicative and vary with daily conditions. The dive center's briefing prevails, and you should never dive beyond your certification level.
Situated off the pristine coastline of Belle Mare on Mauritius's east coast, La Passe du Puits is a celebrated drift dive that stretches approximately 2 kilometres through a natural reef passage. The site takes its name from the French word for "well" or "shaft", a nod to the dramatic topography that channels ocean currents through its corridor. Depths range from a shallow 5 metres at the top of the reef to a more dramatic 30 metres at the outer channel floor, offering something for every level of intermediate diver. The east coast of Mauritius is far less developed than the north or west, lending La Passe du Puits a genuinely wild, frontier feel that sets it apart from the island's more trafficked dive sites.
The drift itself is the star of the show. As the current takes hold, divers are carried effortlessly along the reef wall, past coral gardens, crevices and open water drop-offs in a seamless, almost meditative flow. Boat tenders follow divers at the surface, making pick-up straightforward and allowing full immersion in the experience without navigation concerns. The sheer scale of the pass — combined with its consistent marine encounters — makes it one of the most rewarding dives on the entire island.
La Passe du Puits is a wildlife hotspot, and the cast of characters here is exceptional even by Mauritian standards. Highlights include:
La Passe du Puits carries a moderate current that is the engine of its rich marine life. The current strength can vary significantly with tidal cycles, and dive operators time their entries carefully to ensure an enjoyable rather than exhausting drift. The site is classed as intermediate — divers should be comfortable with open-water drift conditions, buoyancy control in moving water, and the ability to descend and ascend confidently without a fixed line. Visibility is typically excellent on the east coast, often reaching 20–30 metres in optimal conditions, though the site can be affected by cyclone swells or strong southeasterly trade winds, particularly between June and September.
Water temperatures range from around 23°C in winter (July–August) to 29°C in the summer months (December–March), making a 3mm wetsuit comfortable year-round for most divers.
The best months to dive La Passe du Puits are November through May, coinciding with the warm summer season when the southeast trade winds ease and the east coast becomes more accessible. January, February and March offer peak conditions with warm water, excellent visibility and the greatest frequency of pelagic visitors. November and December are also outstanding, with building marine activity as the season swings into summer. April and May remain good options as the season transitions. The winter months of June through September bring trade winds and choppier seas to the east coast, making boat access more challenging and reducing visibility.