4m
    West Coast (Gothenburg), Sweden
    Fladen

    GRETHE

    Best months: Jul–Aug

    Protected Area

    Fladen

    Why dive here

    With 121+ marine species recorded in the area - including dolphins, dwarf minke whales, humpback whales, orcas and seals & sea lions - GRETHE offers some of West Coast (Gothenburg)'s richest wreck diving. Water ranges 3-18°C, warmest July, August, September.

    Best timeJul–Aug
    WetsuitA 5mm wetsuit
    Marine lifeDolphins, Dwarf Minke Whales, Humpback Whales, Orcas and Seals & Sea Lions · 121+ species recorded
    Water3-18°C · warmest July, August, September
    CharacterWreck dive · max 4m
    StandoutRich in charismatic marine life

    Grethe is a genuinely special little wreck, sitting in just four metres of water near Vrångö. We’ve spent many an hour finning around this site, and it’s always a delight. She was a small motor vessel, sunk in November 1944 after hitting a mine, and now she rests mostly intact on a sandy bottom. What makes Grethe such a standout is her accessibility and the way she’s become a home for so much local marine life. You can easily spend an entire dive exploring her hold, peering into the small cabins, and navigating around the bow. The visibility here can be excellent, especially on a calm day, letting the light filter down through the green water and really illuminate the wreck. We often see large schools of juvenile pollack darting through the superstructure, and crabs scuttling amongst the frames. For photographers, it’s a dream – the shallow depth means plenty of ambient light, and the details of the wreck, from rusted machinery to portholes, make for fantastic subjects. It’s a perfect site for new wreck divers or anyone wanting a relaxed, immersive experience with a bit of history.

    Typical GRETHE Dive Profile

    5mSafety Stop0m4m 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.

    Today06:4017:2510h 45m daylightGolden hour 16:32

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    Conditions

    Ocean conditions, forecast and tides for GRETHE

    GRETHE Ocean Conditions

    Monthly averages for GRETHE, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (57.57, 11.03) (3km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    13°C

    56°F · Range: 10.6–15.8°C

    Air Temperature

    10°C

    50°F

    Wind Speed

    6.56 m/s

    12.8 knots

    Atmospheric Pressure

    1010.2 hPa

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

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