M 343 (POSSIBLY)
Protected Area
Les Minquiers
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) - M 343 (POSSIBLY) offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
Diving the M 343 feels like stepping into a cold war thriller, even if it’s a WWII wreck. She sits deep, around 38 meters, making this one for experienced wreck divers comfortable with limited bottom time and potentially strong currents. We love the dramatic silhouette she cuts against the gloom, a German minesweeper scuttled near St Malo but now resting off Cornwall. The wreck is largely intact, offering plenty of nooks and crannies to explore. Expect to find conger eels peering from every dark opening, their thick bodies almost blending with the corroded metal. Schools of bib and pollack shimmer above the decks, darting in and out of the skeletal superstructure. Our favourite part is navigating the stern, where you can still make out the sweep gear, a stark reminder of her original purpose. Visibility can vary wildly here, but on a good day, the M 343 offers an atmospheric, challenging dive with a real sense of history.
Typical M 343 (POSSIBLY) Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Deep dive (38m) - 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.
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Conditions
Ocean conditions, forecast and tides for M 343 (POSSIBLY)
M 343 (POSSIBLY) Ocean Conditions
Monthly averages for M 343 (POSSIBLY), sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (50.44, -2.73) (3km away)
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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