4m
    Cornwall & Devon, United Kingdom
    Selsey Bill and the Hounds

    ARNO (POSSIBLY)

    Best months: Jul–Sep

    Protected Area

    Selsey Bill and the Hounds

    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) - ARNO (POSSIBLY) 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 4m
    StandoutExceptional marine biodiversity

    Forget your preconceptions of UK diving when it comes to the Arno. This isn't a deep, silty trudge; it’s a vibrant, shallow playground. We love it because it’s a perfect shore dive, easy to access, and feels like you've stumbled onto a secret garden. The Arno sits right in the shallows, barely a few metres deep at high tide, so your bottom time is practically unlimited. The wreck itself is well broken, scattered across the seabed, but that’s its charm. You’ll find bits of hull plating, ribs poking up, and the impressive boiler still largely intact, covered in an explosion of colour. Look closely, and you’ll see plumose anemones, dahlia anemones, and a surprising number of wrasse darting in and out of the crevices. The light penetration here is often fantastic, especially on a sunny day with a gentle swell, making the reds and oranges of the anemones truly pop. It’s a photographer’s dream and a perfect site for newer divers or those who just want a relaxed potter without the pressure of depth. We’d suggest going at slack high water for the best visibility.

    Typical ARNO (POSSIBLY) Dive Profile

    5mSafety Stop0m4m 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.

    Today06:2017:2211h 2m daylightGolden hour 16:37

    ARNO (POSSIBLY) Wreck History

    Year Sunk

    1899

    Vessel Type

    cargo ship

    Cause

    unknown

    The vessel identified as possibly being the Arno is a classic late-Victorian steamship, built in the renowned shipbuilding hub of Sunderland in 1871. It was lost in February 1899 while on a passage from Shields to Portsmouth, a common route for coastal traders and colliers of the era. Lying in a mere 4 metres of water, this wreck is extremely accessible, offering a glimpse into 19th-century maritime technology.

    Due to its shallow depth and more than a century of exposure to the coastal environment of Cornwall and Devon, the Arno is a very broken-up site. The dive is a scavenger hunt across the seabed, searching for the tell-tale signs of a steamship. The most prominent feature is often the boiler, too solid to be easily destroyed by the sea. Divers can also find scattered hull plating, ribs, and parts of the 98-horsepower engine, all heavily encrusted and providing a habitat for local marine creatures. It's a perfect dive for a sunny day and is even explorable by snorkelers.

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    Conditions

    Ocean conditions, forecast and tides for ARNO (POSSIBLY)

    ARNO (POSSIBLY) Ocean Conditions

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

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    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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