Inner Islands, Seychelles
    Ile Coco National Park

    Marianne

    Best months: Oct–Feb

    Protected Area

    Ile Coco National Park

    Why dive here

    With 183+ marine species recorded in the area - including barracuda, dolphins, sea turtles, sperm whales and lionfish - Marianne offers some of Inner Islands's richest drift diving. Water ranges 27-30°C, warmest March, April, May.

    Best timeOct–Feb
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeBarracuda, Dolphins, Sea Turtles, Sperm Whales and Lionfish · 183+ species recorded
    Water27-30°C · warmest March, April, May
    CharacterDrift dive
    StandoutExceptional marine biodiversity

    Marianne. Now this is a dive we always look forward to when we’re in the Inner Islands. It’s a proper drift dive, letting the current do the work over a mix of granite boulders and coral patches. We usually drop in and immediately get swept along, often finning past dozens of blacktip and whitetip reef sharks just cruising in the blue. The granite formations here create some really fun swim-throughs and narrow channels. We love pushing through them, feeling the water accelerate a little, and popping out to find a school of eagle rays gliding past. Seeing 20 or 30 eagle rays together is a common sight here, and it always gets us buzzing. Keep an eye out for the smaller stuff too – delicate blennies tucked into crevices and those cool bloodspot pipefish swaying in the current. If you're lucky, a scalloped hammerhead might cruise by in the deeper blue, though they're not an everyday sight. Maximum depth is around 18 metres, so it’s a comfortable dive for most, but that current means you need to be comfortable with a bit of a ride.

    Safety Notes

    Drift dive - carry a surface marker buoy (SMB) and stay with your group. Brief the current direction before entry.

    Today05:5818:0912h 11m daylightGolden hour 17:42

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    Conditions

    Ocean conditions, forecast and tides for Marianne

    Marianne Ocean Conditions

    Monthly averages for Marianne, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (-4.5, 55.52) (2km away)

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    October Averages

    Sea Temperature

    28°C

    82°F · Range: 26.1–30.1°C

    Current Speed

    7.28 cm/s

    Direction: W (285.9°)

    Chlorophyll-a

    0.213 mg/m³

    Clear water

    Salinity

    35.24 PSU

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)

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