10-30m
    Alonissos Marine Park, Greece

    HMS Irresistible

    Best months: Jul–Sep

    Why dive here

    HMS Irresistible is a reef dive where divers can encounter dolphins and sea turtles. Water ranges 15-26°C, warmest July, August, September.

    Best timeJul–Sep
    WetsuitA 3mm shorty or thin full wetsuit
    Marine lifeDolphins and Sea Turtles
    Water15-26°C · warmest July, August, September
    CharacterReef dive · max 10-30m

    The HMS Irresistible wreck, sitting upright on the seabed, isn’t just a hunk of metal; it’s a time capsule. We love how the Mediterranean has softened its sharp edges over the decades, inviting a surprising amount of life to call it home. This Formidable-class battleship, sunk in 1915, is incredibly intact, offering a genuine sense of its grand scale. Drop down and you’ll find yourself hovering over enormous gun turrets, still pointing silently. The deck guns are still visible, and we’ve often spent a good chunk of a dive just imagining the ship in its prime. Look closer, and you’ll spot soft brittlestars draped like delicate lace over the steel plating, and cowfish, often in pairs, peeking from crevices. It’s a site that really suits divers who appreciate history and enjoy the quiet exploration of a substantial wreck, rather than just zooming past a jumble of twisted metal. The visibility here is usually excellent, making it easier to take in the sheer size of the Irresistible.

    Typical HMS Irresistible Dive Profile

    5m10mSafety Stop0m10m 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.

    Today06:2117:4311h 22m daylightGolden hour 17:07

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    Conditions

    Ocean conditions, forecast and tides for HMS Irresistible

    HMS Irresistible Ocean Conditions

    Monthly averages for HMS Irresistible, sourced from Open-Meteo marine data + Copernicus Marine (EU) - nearest station: Open-Meteo marine grid (38.09, 24.15) (15km away)

    ExcellentGreatGoodFairPoor★Best monthsThis month

    October Averages

    Sea Temperature

    23°C

    73°F · Range: 21–25.6°C

    Current Speed

    1.41 cm/s

    Direction: SW (225°)

    Chlorophyll-a

    0.13 mg/m³

    Clear water

    Salinity

    34.63 PSU

    Based on 4 years of monitoring data · Data sources: Open-Meteo marine data + Copernicus Marine (EU)

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