53m
    Cornwall & Devon, United Kingdom
    East of Start Point

    GRETA C

    Best months: Jul–Sep

    Protected Area

    East of Start Point

    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) - GRETA C 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 53m
    StandoutExceptional marine biodiversity

    The *Greta C* is a proper deep dive, a carrier vessel that went down in 1974. She sits upright at 53 metres, and while that depth means advanced trimix certifications are a must, the reward is a remarkably intact wreck. We love how her superstructure is still largely in place, offering some fantastic penetration for suitably trained divers. Entering the bridge feels like stepping back in time, the darkness broken only by your torch beam illuminating control panels and the ghostly outlines of equipment. Down on the main deck, the holds are open, revealing the cavernous spaces where cargo once sat. Look closely for conger eels – we’ve seen some absolute monsters lurking in the shadows, their heads poking out from pipes and crevices. The plating is draped in dead man's fingers and colourful jewel anemones, creating a surprisingly vibrant artificial reef. For us, the *Greta C* really shines on those rare days when visibility stretches to 15 metres or more; then you can truly appreciate her scale as you descend through the blue. It’s a serious dive, no doubt, but one that offers a real sense of exploration and a proper challenge.

    Typical GRETA C Dive Profile

    15m30m45m60mSafety Stop0m53m max~15 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

    Maximum depth 53m exceeds recreational limits (40m). Technical diving certification and equipment required.

    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.

    Today06:2817:3111h 3m daylightGolden hour 16:47

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    Conditions

    Ocean conditions, forecast and tides for GRETA C

    GRETA C Ocean Conditions

    Monthly averages for GRETA C, 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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