La Passe Canon — meaning 'Cannon Pass' — is a classic channel dive located within the lagoon system fringing the east coast of Mauritius. The site takes its name from the historical cannons that once protected this stretch of coastline, a reminder of the island's rich maritime heritage. The dive unfolds through a natural break in the barrier reef where water movement keeps visibility crisp and marine life abundant. Depths are accessible to a broad range of divers, making it a versatile destination for both beginners on guided dives and more experienced divers seeking drift adventure.
The topography features a gently sloping sandy channel flanked by coral ridges and scattered bommies. Coral gardens of hard and soft corals create a kaleidoscopic backdrop, with sea fans stretching their branches into the current to catch passing plankton. The site is generally dived as a drift, allowing you to cover significant ground while conserving energy and air. Visibility averages between 15 and 25 metres depending on season and tidal phase, rewarding divers with panoramic underwater vistas.
La Passe Canon is teeming with Indo-Pacific reef species that thrive in the current-swept environment. Regular encounters include:
The channel's flow ensures that plankton concentrations remain high, which in turn attracts filter feeders and the larger predators that follow them. Dawn dives are particularly rewarding when nocturnal species like lionfish and moray eels are still active.
Conditions at La Passe Canon are largely governed by tidal cycles and the southeast trade winds. The current can range from negligible at slack tide to a moderate drift during peak flow, typically reaching 0.5 to 1 knot — pleasant for drift diving but manageable for newer divers with a guide. The site is well-sheltered from ocean swells by the outer barrier reef, meaning surface conditions are usually calm even when trade winds are blowing strongly.
Water temperatures on the east coast hover between 24°C and 28°C throughout the year, with the warmest waters from December to April. A 3mm wetsuit is comfortable in summer, while a 5mm suit is recommended during the cooler austral winter months of June to September.
La Passe Canon can be dived year-round, but conditions peak during the austral summer from October to April. During this period, water temperatures are warmer, visibility is at its best, and pelagic activity intensifies. The southeast trade wind season (May to September) brings slightly cooler water and occasionally rougher surface conditions, but also clearer visibility as plankton blooms subside. Avoid diving immediately after heavy rainfall or cyclone activity, as run-off from the land can temporarily reduce underwater visibility.