8m
    Cape Town & Western Cape, South Africa
    Marcus Island Marine Protected Area

    CYNTHIA

    Best months: Mar

    Protected Area

    Marcus Island Marine Protected Area

    Why dive here

    With 269+ marine species recorded in the area - including blue sharks, blue whales, dolphins, dwarf minke whales and great white sharks - CYNTHIA offers some of Cape Town & Western Cape's richest wreck diving. Water ranges 14-16°C, warmest February, March, April.

    Best timeMar
    WetsuitA 7mm wetsuit with a hood
    Marine lifeBlue Sharks, Blue Whales, Dolphins, Dwarf Minke Whales and Great White Sharks · 269+ species recorded
    Water14-16°C · warmest February, March, April
    CharacterWreck dive · max 8m
    StandoutExceptional marine biodiversity

    The Cynthia, just outside Granger Bay, offers a chill wreck dive that’s perfect when you want something close to shore. At a shallow 8 metres, it’s a site we often swing by for an easy second dive or when the south-easter is blowing. She was a tug that sank at anchor, and you can still make out the superstructure – the bridge area is especially cool to poke around. What we really love about the Cynthia is how much life has moved in. The deck is carpeted in soft corals, and there are always plenty of shy hottentot and strepies darting between the plates. Look closely in the nooks and crannies for nudibranchs, especially during the spring. It’s a great spot for newer wreck divers to get a feel for penetration, with plenty of light filtering down into the holds. The visibility here can vary a lot, from 5 metres on an average day to 15 metres if you’re lucky, so pick your day. Go on a calm morning, ideally after a few days of no wind, and you’ll find it at its best.

    Typical CYNTHIA Dive Profile

    5m10mSafety Stop0m8m max~60 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

    Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.

    Cold water this month (avg 15°C). Drysuit or thick wetsuit (7mm+) recommended.

    Today05:1317:5812h 44m daylightGolden hour 17:25

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    Conditions

    Ocean conditions, forecast and tides for CYNTHIA

    CYNTHIA Ocean Conditions

    Monthly averages for CYNTHIA, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (-33.92, 18.46) (8km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    15°C

    59°F · Range: 12.4–17.2°C

    Air Temperature

    17°C

    62°F

    Wind Speed

    7.33 m/s

    14.2 knots

    Atmospheric Pressure

    1018.1 hPa

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

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