9m
    Cornwall & Devon, United Kingdom
    Erme Estuary

    ERME ESTUARY

    Best months: Jul–Sep

    Protected Area

    Erme 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) - ERME ESTUARY 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 9m
    StandoutExceptional marine biodiversity

    The Erme Estuary wreck site is a different kind of dive. Forget dramatic walls or colourful reefs, this is about history and discovery. We love how it’s less about a single intact wreck and more about an archaeological treasure hunt. What you're dropping onto here is an assemblage of cannons, some dating back to the 15th century. It feels a bit like diving through a scattered antique shop that sunk centuries ago. You’ll find iron cannons resting on the seabed, encrusted with local life – spider crabs cling to the barrels, and small blennies dart in and out of crevices. Visibility in the estuary can vary quite a bit, so we’d suggest timing your dive for slack water on a neap tide for the clearest conditions, typically around 5-10 metres. The maximum depth is only 9 metres, making it a relaxed rummage for divers who appreciate the story as much as the scenery. It’s a site for those who enjoy slow exploration, where imagination fills in the gaps between the physical remains.

    Typical ERME ESTUARY Dive Profile

    5m10mSafety Stop0m9m 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.

    Today06:3217:3511h 3m daylightGolden hour 16:51

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    Conditions

    Ocean conditions, forecast and tides for ERME ESTUARY

    ERME ESTUARY Ocean Conditions

    Monthly averages for ERME ESTUARY, 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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