27m
    North Sea Coast, Denmark
    Å

    OSTERSJON

    Best months: Jul–Aug

    Protected Area

    Å

    Why dive here

    With 95+ marine species recorded in the area - including seals & sea lions, sea turtles and jellyfish lake - OSTERSJON 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 27m

    Ostersjon isn't for the faint of heart, or for those who need sunny skies and balmy water. This is proper North Sea diving, a dark, moody wreck dive that rewards effort. The Ostersjon, a steamship that went down in 1944, lies upright at 27 metres. We love how intact she is, especially the bow, which still feels imposing as you descend onto it. Visibility here can swing wildly, but when it’s good, say 10 metres, you can really appreciate her scale. Inside, there’s a surprising amount to see; the cargo holds are open, and while you won't be penetrating deep, peeking into the gloom with a torch adds to the atmosphere. Our favourite detail is the way the metalwork has become a canvas for life – dead man's fingers coral coat every surface, and schools of cod and pollock often hover just off the deck, keeping their distance but always present. This site suits experienced cold-water wreck divers who appreciate history and a bit of a challenge. If you come, aim for a slack tide and bring a good primary light; you'll need it.

    Typical OSTERSJON Dive Profile

    10m20m30mSafety Stop0m27m 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 27m - 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.

    Today06:3417:2210h 48m daylightGolden hour 16:30

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    Conditions

    Ocean conditions, forecast and tides for OSTERSJON

    OSTERSJON Ocean Conditions

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

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    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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