22m
    North Sea Coast, Denmark
    Kobberhage kystarealer

    GRETHE A 623

    Best months: Jul–Aug

    Protected Area

    Kobberhage kystarealer

    Why dive here

    With 95+ marine species recorded in the area - including seals & sea lions, sea turtles and jellyfish lake - GRETHE A 623 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 22m

    The Grethe A 623 is a cracking North Sea wreck, especially if you appreciate a bit of history with your dive. She went down in 1944, a fishing vessel caught in the throes of wartime, and she sits upright and largely intact at 22 metres. We love how her wooden structure has softened with time, parts collapsing in on themselves, yet the overall shape is still very much that of a boat. Diving her, you get this incredible sense of a moment frozen in time. The bow is particularly photogenic, often draped in fishing nets, home to schools of cod and pollock. Look closely and you'll spot crabs scuttling over the decking and anemones clinging to the metalwork. Our favourite time to dive her is on an incoming tide when the visibility often pushes past 10 metres, allowing you to really soak in the atmosphere. It’s a dive for those who enjoy exploration, with plenty of nooks and crannies to peer into, though penetration is definitely not advised given her age and the nature of the collapse. We'd suggest this one for advanced divers, purely due to the North Sea conditions and the potential for currents.

    Typical GRETHE A 623 Dive Profile

    10m20mSafety Stop0m22m 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 22m - Advanced Open Water certification recommended.

    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.

    Today06:3917:2810h 49m daylightGolden hour 16:37

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    Conditions

    Ocean conditions, forecast and tides for GRETHE A 623

    GRETHE A 623 Ocean Conditions

    Monthly averages for GRETHE A 623, 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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