46m
    Cornwall & Devon, United Kingdom
    Dolphin Head Highly Protected Marine Area

    GREAVESASH

    Best months: Jul–Sep

    Protected Area

    Dolphin Head Highly Protected Marine Area

    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) - GREAVESASH 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 46m
    StandoutExceptional marine biodiversity

    The Greavesash is a proper dive, a deep shot that rewards the effort. Lying in 46 metres, this isn't one for the casually certified, but for those with the training, she’s a beauty. We love dropping onto the bow, often silhouetted against the ambient light filtering down, with the stern rising slightly as you work your way along the deck. The hull is still largely intact, a testament to her robust build, and we've spent many an hour exploring the holds, peering into what would have been the engine room, feeling that tangible connection to maritime history. The marine life here can be surprisingly good, given the depth. Conger eels are often tucked into any available crevice, their eyes following you as you pass. Look for colourful jewel anemones coating the plates, and we’ve seen some hefty lobsters marching across the sand nearby. Our pick for timing is often a slack tide around midday for the best light penetration and calmer conditions; it makes the descent and ascent much more enjoyable when you’re not battling the current. It’s a serious dive, but the sense of accomplishment, and the sheer scale of the wreck, makes it a standout for us.

    Typical GREAVESASH Dive Profile

    15m30m45mSafety Stop0m46m 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 46m 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.

    Today06:2017:2411h 4m daylightGolden hour 16:40

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    Conditions

    Ocean conditions, forecast and tides for GREAVESASH

    GREAVESASH Ocean Conditions

    Monthly averages for GREAVESASH, 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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