12m
    North Sea Coast, Denmark
    Vresen

    MARTHA

    Best months: Jul–Aug

    Protected Area

    Vresen

    Why dive here

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

    Martha. Even the name sounds like a grandmother's secret. This isn’t your typical Caribbean coral garden, not even close, but for us, it’s a brilliant dive for those cooler, murkier days that Denmark often delivers. The Martha herself is a trawler, a proper working boat that found her resting place upright on the seabed at a shallow 12 metres. What we love about Martha is her accessibility. You can spend a good hour just finning around her structure. The wheelhouse is still largely intact, and peering into it, you almost expect to see the captain’s ghost. She’s become a home for a surprising amount of life. Crabs scuttle across the deck plating, and we’ve often spotted decent-sized cod lurking in the shadows of the hold. It’s a great spot for photographers keen on wreck details and the hardy critters that call them home. Our tip? Go on a slack tide day; the North Sea can be a bit frisky, and a calm current really helps with visibility around the wreck. It’s a dive for those who appreciate history and don't mind trading bright colours for an atmospheric wreck exploration.

    Typical MARTHA 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.

    Today06:3917:2910h 51m daylightGolden hour 16:39

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    Conditions

    Ocean conditions, forecast and tides for MARTHA

    MARTHA Ocean Conditions

    Monthly averages for MARTHA, 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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