40m
    Cornwall & Devon, United Kingdom
    Castlemartin Coast

    MARECA

    Best months: Jul–Sep

    Protected Area

    Castlemartin Coast

    Why dive here

    With 176+ marine species recorded in the area - including blue sharks, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - MARECA offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.

    Best timeJul–Sep
    WetsuitA 5mm wetsuit
    Marine lifeBlue Sharks, Dolphins, Dwarf Minke Whales, Humpback Whales and Ocean Sunfish (Mola Mola) · 176+ species recorded
    Water10-18°C · warmest July, August, September
    CharacterWreck dive · max 40m
    StandoutExceptional marine biodiversity

    The Mareca, a solid steamship from 1882, sits upright at 40 metres, a proper deep dive that’s well worth the effort. We love how intact she feels, like a ghost ship resting on the seabed. You descend onto her deck, still largely coherent, and can push through some of the holds if you're comfortable with overheads. What really makes her for us are the three boilers, standing proud and covered in plumose anemones, their white tentacles waving gently in the faint current. Look closely and you’ll find plenty of spider crabs picking their way across the metalwork, and often a big conger eel or two lurking in the darker corners. She's a fantastic wreck for experienced divers comfortable with the depth and cold water, offering a real sense of history and some brilliant macro opportunities if you take your time.

    Typical MARECA Dive Profile

    15m30m45mSafety Stop0m40m max~20 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

    Deep dive (40m) - monitor air consumption closely. Advanced certification recommended.

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

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

    Today06:3717:3711h 0m daylightGolden hour 16:52

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    Conditions

    Ocean conditions, forecast and tides for MARECA

    MARECA Ocean Conditions

    Monthly averages for MARECA, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (50.44, -2.73) (3km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    17°C

    62°F · Range: 15.1–17.5°C

    Air Temperature

    13°C

    56°F

    Wind Speed

    8.14 m/s

    15.8 knots

    Atmospheric Pressure

    1011 hPa

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

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