12m
    North Sea Coast, Denmark
    Sydlige Nordsø

    CASTOR

    Best months: Jul–Aug

    Protected Area

    Sydlige Nordsø

    Why dive here

    With 95+ marine species recorded in the area - including seals & sea lions, sea turtles and jellyfish lake - CASTOR offers some of North Sea Coast's richest wreck diving. Water ranges 3-19°C, warmest July, August, September.

    Best timeJul–Aug
    WetsuitA 5mm wetsuit
    Marine lifeSeals & Sea Lions, Sea Turtles and Jellyfish Lake · 95+ species recorded
    Water3-19°C · warmest July, August, September
    CharacterWreck dive · max 12m

    The Castor is one of those wrecks that just feels… solid. Lying in a consistent 12 metres, it's a calm dive, often with surprisingly good visibility for the North Sea. We’ve always found it a great spot for an easy afternoon, especially if the wind has died down. The fishing vessel went down in 1899, a collision with another German trawler, and over a century on, it’s a proper artificial reef. What you'll find here is a robust frame, well-colonised by life. The metalwork is draped in dead man's fingers and colourful anemones, providing plenty of nooks for small fish. Cod and pollack often hold station around the upright sections, and we’ve even spotted the occasional lobster tucked away beneath plates of steel. It’s a great introduction to wreck diving for those comfortable with the depth, offering enough structure to explore without being overly complex. We love picking through the debris field around the main hull; you never know what the sand might have uncovered after a good storm.

    Typical CASTOR Dive Profile

    5m10mSafety Stop0m12m 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.

    Cold water this month (avg 13°C). Drysuit or thick wetsuit (7mm+) recommended.

    Always perform a 3-minute safety stop at 5m before surfacing.

    Today06:5017:4110h 50m daylightGolden hour 16:51

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    Conditions

    Ocean conditions, forecast and tides for CASTOR

    CASTOR Ocean Conditions

    Monthly averages for CASTOR, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (55.31, 9.86) (1km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    13°C

    56°F · Range: 10.7–16.8°C

    Air Temperature

    11°C

    52°F

    Wind Speed

    7.69 m/s

    14.9 knots

    Atmospheric Pressure

    1010.5 hPa

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data

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