Cornwall & Devon, United Kingdom
    West of Wight-Barfleur

    USS Illinois

    Best months: Jul–Sep

    Protected Area

    West of Wight-Barfleur

    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) - USS Illinois 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
    StandoutExceptional marine biodiversity

    The USS Illinois isn't just a hunk of metal; it’s a portal to maritime history, sitting off the coast of Cornwall. We love how the wreck, originally a French battleship then seized by the US, tells a story of shifting naval power, now gently succumbing to the currents and the sea life. You descend into the often green, moody waters and the wreck slowly materialises, its size impressive. What makes it special? For us, it’s the sense of scale and the way the superstructure has collapsed, creating swim-throughs that are just begging to be explored. Inside, we’ve found conger eels coiled in the shadows, their eyes tracking your light, and a surprising number of wrasse darting between twisted girders. Visibility can vary wildly here; we’d suggest aiming for slack tide on a neap to get the best views and avoid battling the surge. It’s a site for those who appreciate wrecks with a bit of mystery and enjoy a dive where you can truly feel the weight of history around you.

    Safety Notes

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

    Today06:2517:2911h 4m daylightGolden hour 16:45

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    Conditions

    Ocean conditions, forecast and tides for USS Illinois

    USS Illinois Ocean Conditions

    Monthly averages for USS Illinois, 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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