41m
    Cornwall & Devon, United Kingdom
    South Dorset

    IOLANTHE

    Best months: Jul–Sep

    Protected Area

    South Dorset

    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) - IOLANTHE 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 41m
    StandoutExceptional marine biodiversity

    The Iolanthe sits upright at 41 metres, a proper deep dive that’s worth the effort. We love the scale of this wreck; it’s a big steamship, over 99 metres long, and the bow section, in particular, makes for a dramatic entry. Dropping down, you’ll start to pick out the superstructure, usually draped in fishing nets, with the ship’s ribs creating dark alcoves. What we really enjoy here are the signs of its age – the hull plates are peeling away in places, giving you glimpses into the inner workings, and the sheer volume of life that’s colonised it. Conger eels are always lurking in the darker corners, their heads poking out from the collapsed sections, and you’ll often find large bib and pollack schooling around the stern. It's a fantastic historical dive for experienced wreck enthusiasts. A strong torch is essential to cut through the gloom and really appreciate the details. Dive it on a slack tide for the best chance to explore the expansive deck.

    Typical IOLANTHE Dive Profile

    15m30m45mSafety Stop0m41m 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 41m 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.

    Today06:2517:2711h 3m daylightGolden hour 16:43

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    Conditions

    Ocean conditions, forecast and tides for IOLANTHE

    IOLANTHE Ocean Conditions

    Monthly averages for IOLANTHE, 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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