1m
    Cornwall & Devon, United Kingdom
    Bonchurch Landslips

    UNDERLEY

    Best months: Jul–Sep

    Protected Area

    Bonchurch Landslips

    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) - UNDERLEY 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 1m
    StandoutExceptional marine biodiversity

    We love the Underley for a proper wreck dive, even if it’s a shallow one. This iron sailing vessel, sunk way back in 1871, lies broken but still recognisable, with parts of her hull and ribs creating a fantastic structure to explore. It’s not about finding intact cabins; it’s about the sheer scale and the way the sea has reclaimed her. We always find the bow section particularly compelling, jutting up from the seabed. Vis here can be classic UK style, a bit green with a good bit of particulate, but on a calm day, when the sun pierces through, the light plays beautifully across the ironwork. Expect to find plenty of crabs tucked into crevices, some surprisingly large lobsters peering out, and an abundance of wrasse darting through the skeletal remains. It’s a site that feels genuinely historical, a tangible link to Cornwall’s maritime past. Our favourite approach is to take our time, tracing the length of the wreck, imagining the cargo of cotton and gunpowder she carried. This is a dive for those who appreciate the ghost of a ship and the life it now supports, rather than a pristine reef.

    Typical UNDERLEY Dive Profile

    Safety Stop0m1m 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.

    Today06:2117:2311h 2m daylightGolden hour 16:39

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    Conditions

    Ocean conditions, forecast and tides for UNDERLEY

    UNDERLEY Ocean Conditions

    Monthly averages for UNDERLEY, 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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