MERDIS
Protected Area
Wight-Barfleur Reef
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) - MERDIS offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
We love the Merdis. This wreck, a casualty of a German U-boat in 1917, now rests upright on the seabed at 35m. Dropping down, the first thing that hits you is the sheer scale. It's a big ship, still largely intact, and you can swim through the holds, imagining the cargo she once carried. The light filters down, illuminating clouds of juvenile pollock that swirl through the superstructure. Look closer, and you’ll find conger eels peering from every dark recess, their heads like knobbly fists, and the occasional dogfish tucked into the sand nearby. Our favourite moment is always finning past the stern, where the prop shaft and rudder are still clearly visible, encrusted in dead man's fingers. It's a dive that rewards slow exploration, allowing you to really soak in the history and the way the ocean has reclaimed it. Visibility can be a bit of a lottery, as it often is off the Cornish coast, but when it’s good, the Merdis is simply fantastic. Definitely one for experienced divers comfortable with deeper wrecks and the occasional current.
Typical MERDIS 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 (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.
Nearest Dive Centres to MERDIS
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Conditions
Ocean conditions, forecast and tides for MERDIS
MERDIS Ocean Conditions
Monthly averages for MERDIS, 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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