60m
    Bornholm, Denmark

    KOL-31

    Best months: Jul–Sep

    Why dive here

    With 66+ marine species recorded in the area - including jellyfish lake - KOL-31 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 60m

    KOL-31 isn't your average lump of metal on the seabed. This wreck, a German merchant ship sunk during WWII, is a true historical relic, and we love diving it for that exact reason. Dropping down, the first thing you notice is the sheer scale – it's a big boat, sitting upright and mostly intact, which is always a bonus. We'd suggest carrying a good torch, not just for penetration but to really pick out the details in the holds and along the superstructure. Expect strong thermoclines, especially in late summer, so be ready for the temperature to drop significantly as you descend. The hold sections are particularly interesting. We’ve spent many a dive finning through them, imagining the cargo they once carried. You’ll find plenty of cod sheltering in the darker corners, and the occasional ling slithering along the decks. Visibility can vary wildly here, from a glorious 15 metres to a murkier 5, so pick your day carefully. Our favourite time to dive KOL-31 is on a calm morning; the light, even at 60 metres, has a different quality, and the currents tend to be more forgiving. It’s a site for experienced wreck divers, definitely not one for your first deep dive.

    Typical KOL-31 Dive Profile

    15m30m45m60mSafety Stop0m60m max~15 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

    Maximum depth 60m exceeds recreational limits (40m). Technical diving certification and equipment required.

    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.

    Today06:1817:1010h 53m daylightGolden hour 16:21

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    Conditions

    Ocean conditions, forecast and tides for KOL-31

    KOL-31 Ocean Conditions

    Monthly averages for KOL-31, 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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