51m
    Cornwall & Devon, United Kingdom
    Gouliot Caves and Headland, Sark

    GUYONA

    Best months: Jul–Sep

    Protected Area

    Gouliot Caves and Headland, Sark

    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) - GUYONA 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 51m
    StandoutExceptional marine biodiversity

    The *Guyona*, a compact fishing vessel resting at 51 metres, is one of our favourite deep wrecks off the Cornish coast. Dropping down, you hit the bow first, often with a bit of a current pushing you along the deck. The wheelhouse is still intact, though a bit squashed, and it’s always interesting to peek inside, imagining the last moments. What we really love about the *Guyona* is how quickly it’s become home to so much life. You'll find good-sized conger eels tucked into any available hole, and often a decent number of lobsters marching across the deck. Keep an eye out for dogfish resting on the sand nearby too. Visibility can be a real lottery out here; we've had days of 20 metres and others where it's a murky five. Best to go on a slack tide, otherwise, you're looking at a serious workout. This isn't a wreck for beginners; the depth and potential for current mean you need your wits about you, but for experienced tech divers, it’s a rewarding dive.

    Typical GUYONA Dive Profile

    15m30m45mSafety Stop0m51m 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 51m 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.

    Today06:2517:3011h 5m daylightGolden hour 16:46

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    Conditions

    Ocean conditions, forecast and tides for GUYONA

    GUYONA Ocean Conditions

    Monthly averages for GUYONA, 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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