6m
    Cornwall & Devon, United Kingdom
    Dannonchapel and Tregardock

    CASTOR 1

    Best months: Jul–Sep

    Protected Area

    Dannonchapel and Tregardock

    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) - CASTOR 1 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 *Castor 1* is a proper, no-nonsense wreck dive, and we rate it as one of the best shallow wrecks in the area. Sunk in 1980, this old carrier sits bolt upright, almost intact, in just six metres of water. It’s perfect for newer wreck divers or anyone who just loves a long bottom time poking around a good structure. You can fin right along her deck, spotting the davits still in place, or peer down into the holds where schools of bib often hover, darting into the shadows as you approach. We love how much life has colonised the *Castor 1*. The superstructure is thick with plumose anemones, their white tentacles swaying gently, and you’ll often find dogfish resting amongst the debris. On a sunny day, the light filters through the kelp growing on the mast, creating an almost cathedral-like feel. Our advice: go on a slack tide, ideally after a few days of calm weather, and take your time. You’ll be surprised what you can find tucked into every nook and cranny.

    Typical CASTOR 1 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.

    Today06:3617:3811h 2m daylightGolden hour 16:53

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    Conditions

    Ocean conditions, forecast and tides for CASTOR 1

    CASTOR 1 Ocean Conditions

    Monthly averages for CASTOR 1, 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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