15-30m
    Flic en Flac & West Coast, Mauritius
    Black River Fishing Reserve

    La Cathédrale

    Best months: Nov–Feb

    Protected Area

    Black River Fishing Reserve

    Why dive here

    With 434+ marine species recorded in the area - including barracuda, blue sharks, dolphins, dwarf minke whales and great white sharks - La Cathédrale offers some of Flic en Flac & West Coast's richest reef diving. Water ranges 25-29°C, warmest February, March, April.

    Best timeNov–Feb
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Blue Sharks, Dolphins, Dwarf Minke Whales and Great White Sharks · 434+ species recorded
    Water25-29°C · warmest February, March, April
    CharacterReef dive · max 15-30m
    StandoutExceptional marine biodiversity

    La Cathédrale isn't just a dive; it's an exploration. We love the way the light plays inside the cavern, filtering down from the cracks above, making the water glow in shades of blue you rarely see. It’s not a huge cave, but the structure itself is the star here – huge arches and columns carved into the reef, hence the name. Descend along the wall, which is often dotted with honeycombed groupers peering from crevices, then you’ll find the main entrance. Inside, the rock formations are incredible. Look up and you’ll see the light shafts piercing through, a really dramatic sight. Along the walls and overhangs, we’ve spotted red squirrelfish and the more skittish dwarf scorpionfish, blending perfectly with the coral. Keep an eye out for silver-streaked rainbowfish darting in and out of the shadows. The maximum depth sits around 26 meters, making it a good choice for advanced open water divers comfortable with overhead environments. Stronger currents can sometimes make the entry a bit lively, so check conditions with your dive operator. We’d suggest going in the morning; the sun angle is usually best for those incredible light rays.

    Typical La Cathédrale Dive Profile

    5m10m15mSafety Stop0m15m max~50 min estimated bottom time

    Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.

    Safety Notes

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today05:4418:1212h 28m daylightGolden hour 17:43

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    Conditions

    Ocean conditions, forecast and tides for La Cathédrale

    La Cathédrale Ocean Conditions

    Monthly averages for La Cathédrale, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (-20.25, 57.38) (7km away)

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    October Averages

    Sea Temperature

    25°C

    77°F · Range: 24.2–27.5°C

    Air Temperature

    24°C

    76°F

    Wind Speed

    7.13 m/s

    13.9 knots

    Atmospheric Pressure

    1017.9 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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