51m
    Cornwall & Devon, United Kingdom
    East of Start Point

    HMS HARSTAD

    Best months: Jul–Sep

    Protected Area

    East of Start Point

    Why dive here

    With 176+ marine species recorded in the area - including blue sharks, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - HMS HARSTAD offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.

    Best timeJul–Sep
    WetsuitA 5mm wetsuit
    Marine lifeBlue Sharks, Dolphins, Dwarf Minke Whales, Humpback Whales and Ocean Sunfish (Mola Mola) · 176+ species recorded
    Water10-18°C · warmest July, August, September
    CharacterWreck dive · max 51m
    StandoutExceptional marine biodiversity

    The HMS Harstad, lying deep at 51 metres off the Cornish coast, is one of those wrecks that just gets under your skin. We've spent a good few decompression stops thinking about the story she tells. Built as the trawler Kos XVII, then pressed into service as a Norwegian minesweeper, she’s a small ship, only 36 metres long, but she’s full of character. You can still make out the bow mount and some of her structure, despite the years. She went down in 1943, and the cold, dark waters have preserved her surprisingly well. When the visibility is good, which we find is often the case outside of late summer, the sight of her masts reaching up from the seabed is quite something. We particularly love the wheelhouse area, where conger eels have found their permanent residence, and those big jewel anemones just add incredible splashes of colour. This is a dive for experienced wreck enthusiasts, those comfortable with deeper profiles and managing their gas in low light. Expect proper UK diving – a bit of chill, a bit of current sometimes, but a genuinely rewarding wreck that feels like stepping back in time.

    Typical HMS HARSTAD Dive Profile

    15m30m45mSafety Stop0m51m 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 51m 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.

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

    Today06:2817:3111h 3m daylightGolden hour 16:47

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    Conditions

    Ocean conditions, forecast and tides for HMS HARSTAD

    HMS HARSTAD Ocean Conditions

    Monthly averages for HMS HARSTAD, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (50.44, -2.73) (3km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    17°C

    62°F · Range: 15.1–17.5°C

    Air Temperature

    13°C

    56°F

    Wind Speed

    8.14 m/s

    15.8 knots

    Atmospheric Pressure

    1011 hPa

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

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