6m
    Cornwall & Devon, United Kingdom
    Severn Estuary

    JOHANN CARL

    Best months: Jul–Sep

    Protected Area

    Severn Estuary

    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) - JOHANN CARL 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 6m
    StandoutExceptional marine biodiversity

    The *Johann Carl* isn't about depth or pristine reefs; it’s a living history lesson, right there in the shallows. We love a good accessible wreck, and this 1917 sailing vessel delivers on character. You’ll find her broken up but still recognisable, with ribs and planks scattered across the seabed like forgotten bones. It’s an ideal spot for newer divers, or anyone who just wants a relaxed bimble without worrying about deco stops. We’ve seen schools of juvenile pollock darting through the structure, and it’s a brilliant place to spot flatfish half-buried in the sand. The light plays beautifully through the water, illuminating the rust-coloured timbers and the green algae that now coats them. Our best tip? Go on a calm day, ideally around slack tide, to really appreciate the visibility and poke around without a strong current nudging you along. It's a proper wreck experience, just without the deep dive commitment.

    Typical JOHANN CARL Dive Profile

    5mSafety Stop0m6m 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.

    Today06:2917:2911h 0m daylightGolden hour 16:44

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    Conditions

    Ocean conditions, forecast and tides for JOHANN CARL

    JOHANN CARL Ocean Conditions

    Monthly averages for JOHANN CARL, 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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