24m
    Cornwall & Devon, United Kingdom
    Flat Holm

    MIDDLESEX

    Best months: Jul–Sep

    Protected Area

    Flat Holm

    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) - MIDDLESEX 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 24m
    StandoutExceptional marine biodiversity

    The Middlesex, off the coast of Cornwall, is a proper chunk of history on the seabed. We love it because it’s a big wreck, 140 metres long, and you really feel the scale as you descend onto it. Sunk in 1941, this steamship lies in about 24 metres, providing plenty of structure to explore. You’ll find schools of bib and pollack darting through the superstructure, and the boilers are always a favourite spot to peer into – watch for conger eels tucked away in the shadows. Visibility can be a typical UK affair, sometimes a bit murky, but on a good day, the sheer size of the Middlesex is impressive. It’s a dive for those who appreciate the weight of history and don't mind a bit of a current. We’d suggest timing your dive for slack water to make the most of the deck exploration; otherwise, it can be a bit of a workout. It’s a site for experienced divers, given the depth and potential for currents, but totally worth it for the sense of discovery.

    Typical MIDDLESEX Dive Profile

    10m20mSafety Stop0m24m max~30 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

    Depth of 24m - Advanced Open Water certification recommended.

    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.

    Today06:3017:3011h 1m daylightGolden hour 16:45

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    Conditions

    Ocean conditions, forecast and tides for MIDDLESEX

    MIDDLESEX Ocean Conditions

    Monthly averages for MIDDLESEX, 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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