1m
    Cornwall & Devon, United Kingdom
    Portsmouth Harbour

    HMS INSOLENT

    Best months: Jul–Sep

    Protected Area

    Portsmouth Harbour

    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 INSOLENT 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 1m
    StandoutExceptional marine biodiversity

    The HMS Insolent, a gunboat with a name that always makes us chuckle, lies in Portsmouth Harbour. It’s not a deep dive by any stretch, a mere meter at most, which makes it perfect for a snorkel or a shallow exploration on a calm day. We love that it’s so accessible, right there in the harbour, feeling a bit like a forgotten secret amidst the bustling activity. What you'll find is the skeletal remains of a vessel, surprisingly intact for something that’s been down since 1922 and then relocated. The metalwork is encrusted with barnacles, a rough, textured skin, and we often spot small crabs scuttling amongst the plates. Shoals of tiny fish, sometimes mullet, often hover over the structure, darting away as you approach. It’s not a site for grand coral vistas, obviously, but for a glimpse into history, a peek at the tenacious life adapting to an artificial reef in an urban setting, it's our favourite. You can trace its length, imagining its past life, while above, the modern world goes on.

    Typical HMS INSOLENT Dive Profile

    Safety Stop0m1m 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.

    Today06:2117:2311h 2m daylightGolden hour 16:38

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    Conditions

    Ocean conditions, forecast and tides for HMS INSOLENT

    HMS INSOLENT Ocean Conditions

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

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    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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