19m
    Cornwall & Devon, United Kingdom
    Swanpool

    N G PETERSEN

    Best months: Jul–Sep

    Protected Area

    Swanpool

    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) - N G PETERSEN 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 19m
    StandoutExceptional marine biodiversity

    The N G PETERSEN, for us, is classic Cornish wreck diving. She’s a decent size at 72.9m, an old steamship that went down in 1918 after tangling with another vessel, the SS Siri. We love how accessible she is, sitting upright at 19m, which means decent bottom time and usually good light penetration even on a greyer day. When you drop down, the wreck feels substantial. You’ll fin over plates and beams, maybe glimpse the stern or bow depending on where your shot lands. What makes her a standout for us isn't just the history, but the way marine life has completely taken over. Big schools of bib swarm the superstructure, swirling around you like a silver cloud, and conger eels are everywhere, peeking out from every crevice and collapsed section. We’ve spotted dogfish tucked into the sand nearby, too. Our favourite thing is to just drift along the main deck, letting the gentle surge rock you as you watch the light filter through the shoals of fish. It’s a proper atmospheric dive, best on a neap tide for minimal current, and brilliant for anyone who enjoys exploring a solid piece of maritime history colonised by some lively local inhabitants.

    Typical N G PETERSEN Dive Profile

    10m20mSafety Stop0m19m max~30 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

    Depth of 19m - Advanced Open Water 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.

    Today06:3617:3911h 3m daylightGolden hour 16:55

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    Conditions

    Ocean conditions, forecast and tides for N G PETERSEN

    N G PETERSEN Ocean Conditions

    Monthly averages for N G PETERSEN, 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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