4m
    Cornwall & Devon, United Kingdom
    St Helen's Duver & Priory Wood

    FAST FLOW

    Best months: Jul–Sep

    Protected Area

    St Helen's Duver & Priory Wood

    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) - FAST FLOW 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

    Fast Flow is one of those sites we always recommend to newer divers who want to experience a wreck, but without the depth. It’s a bit like a playground, really. This motor vessel sits in a shallow, sheltered bay, often less than 4 metres deep, and the current description as a "dangerous wreck" is more about its history than its present state. We love poking around its broken remains, the engine block is still pretty intact, and the propeller shaft is easy to spot. The metalwork, heavily encrusted with dead man's fingers and colourful jewel anemones, hums with tiny crabs scuttling over every surface. You’ll find blennies peering out from crevices, and small shoals of pollack often cruise through the gaps in the hull. Visibility here can be surprisingly good on a calm day, giving the whole site a luminous quality, especially in the late afternoon. Our favourite tip? Go at high slack tide. It makes exploring the nooks and crannies much easier. Just remember your surface marker buoy, as small boats do use the bay.

    Typical FAST FLOW 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.

    Today06:2117:2311h 2m daylightGolden hour 16:38

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    Conditions

    Ocean conditions, forecast and tides for FAST FLOW

    FAST FLOW Ocean Conditions

    Monthly averages for FAST FLOW, 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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