Flic en Flac & West Coast, Mauritius
    Black River Fishing Reserve

    Big Rock, Mauritius

    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 - Big Rock, Mauritius offers some of Flic en Flac & West Coast's richest cave 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
    CharacterCave dive
    StandoutExceptional marine biodiversity

    Big Rock is one of those drift dives that, with the right current, really shines. We’ve found ourselves just hanging in the blue here, watching the world slide by. It’s essentially a massive submerged boulder, or a series of them really, creating interesting swim-throughs and overhangs. The rock itself is covered in sponges and anemones, which are always busy with small critters. Look closely for those tiny Minute Triplefins darting around, and we often spot a Dwarf Moray peeking out from a crevice. The real magic happens when a smooth current picks up. That’s when you get the chance to drift past schools of Black-banded Hogfish and see those elegant Candelamoa Parrotfish munching on the coral. Visibility can be excellent, often hitting that 19m average or better, making it perfect for spotting larger pelagics further out. We’ve had a few incredible encounters with eagle rays here, soaring past us in the deeper water towards the 22m mark. It’s a site that works for most qualified divers, but really comes alive for those who appreciate a relaxed drift and keep an eye out for the big stuff passing through.

    Safety Notes

    Overhead environment - never enter without proper cave/cavern training, redundant equipment, and a guideline.

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

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    Conditions

    Ocean conditions, forecast and tides for Big Rock, Mauritius

    Big Rock, Mauritius Ocean Conditions

    Monthly averages for Big Rock, Mauritius, 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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