35m
    Cornwall & Devon, United Kingdom
    Purbeck Coast

    Wreck of HMT Arfon

    Best months: Jul–Sep

    Protected Area

    Purbeck Coast

    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) - Wreck of HMT Arfon 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 35m
    StandoutExceptional marine biodiversity

    The Wreck of HMT Arfon holds a special place for us, a tangible piece of history sitting upright at 35 metres. When the visibility is good, which is often surprisingly decent in this part of Cornwall, the trawler comes into view slowly, almost eerily, as you descend. We love drifting along the deck, picking out the details – the impressive 6-pounder gun still mounted on the bow, a solemn reminder of its wartime role. It’s a great dive for divers comfortable with depth, allowing plenty of time to explore the bridge area and the surprisingly intact stern section. The Arfon has become a fantastic artificial reef. We’ve seen conger eels peering out from gaps in the plating, their thick bodies camouflaged against the rust. Lobsters tuck themselves into crevices, and the sheer number of jewel anemones covering almost every surface is incredible, painting the metalwork in a thousand tiny, vibrant colours. Our favourite spot is the stern, where you can often find large schools of pollack circling the structure, their silver scales flashing in the ambient light. It’s a powerful dive, especially knowing its story, and a real standout for UK wreck diving.

    Typical Wreck of HMT Arfon Dive Profile

    15m30mSafety Stop0m35m max~20 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

    Deep dive (35m) - monitor air consumption closely. Advanced certification recommended.

    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.

    Today06:2417:2711h 2m daylightGolden hour 16:42

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    Conditions

    Ocean conditions, forecast and tides for Wreck of HMT Arfon

    Wreck of HMT Arfon Ocean Conditions

    Monthly averages for Wreck of HMT Arfon, 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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