North Sea Coast, Denmark

    HMS Seal

    Best months: Jul–Aug

    Why dive here

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

    The HMS Seal isn’t your typical North Sea wreck. It's a submarine, a Grampus-class beauty from 1938, and its story is etched into every riveted plate. We love that it’s still largely intact, sitting upright, with a palpable sense of history. Dropping down, you feel the cold embrace of the North Sea, but the visibility, often surprisingly good here, lets you pick out details – a conning tower, torpedo tubes, even the periscope housing. It’s a dive for those who appreciate engineering and a bit of a challenge. Currents can be tricky, so pick your day carefully, ideally on a slack tide. Inside, if you're qualified and brave enough for proper penetration, the confined spaces are a real experience; outside, the external structure is colonised by anemones and hydroids. Look for the black gobies darting between the metalwork and the common sea stars clinging on. It’s a serious wreck dive, not for beginners, but incredibly rewarding for those who make the journey.

    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.

    Today06:4017:3310h 53m daylightGolden hour 16:45

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    Conditions

    Ocean conditions, forecast and tides for HMS Seal

    HMS Seal Ocean Conditions

    Monthly averages for HMS Seal, 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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