24m
    Bornholm, Denmark
    K - Strict

    JAN HEWELIUSZ

    Best months: Jul–Sep

    Protected Area

    K - Strict

    Why dive here

    With 66+ marine species recorded in the area - including jellyfish lake - JAN HEWELIUSZ offers some of Bornholm's richest wreck diving. Water ranges 3-18°C, warmest July, August, September.

    Best timeJul–Sep
    WetsuitA 5mm wetsuit
    Marine lifeJellyfish Lake · 66+ species recorded
    Water3-18°C · warmest July, August, September
    CharacterWreck dive · max 24m

    The Jan Heweliusz wreck off Bornholm is a serious piece of history. We’ve been down to her a few times, and the sheer scale of the capsized ferry is always a bit humbling. You drop onto the starboard side, which is now the uppermost, lying at 24 metres. It’s dark down there, even on a sunny day, with the water often feeling thick with suspended particles, giving it that classic Baltic green hue. The Heweliusz went down in a brutal storm in ‘93, carrying trains and lorries, and that chaos is still evident. We love nosing around the exposed parts – the railings, the sheer bulk of the hull, and the huge props at the stern. Look for the massive anchor chain still spilling out of the hawsepipe. It’s an eerie experience, imagining the force of the waves that flipped her. Visibility can be tricky, so we always suggest a good primary light and a backup. It’s a site for experienced wreck divers who appreciate a sombre, dramatic dive over a vibrant coral garden. No bright colours here, just the stark beauty of a ship reclaimed by the sea.

    Typical JAN HEWELIUSZ Dive Profile

    10m20mSafety Stop0m24m 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 24m - 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 14°C). Drysuit or thick wetsuit (7mm+) recommended.

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

    Today06:2417:1710h 53m daylightGolden hour 16:28

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    Conditions

    Ocean conditions, forecast and tides for JAN HEWELIUSZ

    JAN HEWELIUSZ Ocean Conditions

    Monthly averages for JAN HEWELIUSZ, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (54.94, 13.85) (7km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    14°C

    57°F · Range: 11.7–16.3°C

    Air Temperature

    12°C

    53°F

    Wind Speed

    8.16 m/s

    15.9 knots

    Atmospheric Pressure

    1013.3 hPa

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

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