ALERT
Protected Area
Offshore Overfalls
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) - ALERT offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
Diving the Alert, a 38-meter steamship that sank off the coast of Cornwall in 1916, feels like stepping back in time. At 45 meters, it’s a site best suited for experienced divers comfortable with deeper wrecks and cooler water. We found plenty of character here, from the upright boiler standing proud to the bows and stern, both still distinct. Expect to see plenty of local marine residents: conger eels peeking from the shadows, big lobsters tucked into crevices, and schools of pollack often circling above the superstructure. It’s a proper piece of history, nicely settled into the seabed.
Typical ALERT Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Maximum depth 45m 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.
Nearest Dive Centres to ALERT
Dive shops near ALERT
Sussex Diving & Leisure
Mulberry Marine Experiences CIC
Abyss Scuba School
Ocean View
In2 Diving
Reviews for ALERT
Conditions
Ocean conditions, forecast and tides for ALERT
ALERT Ocean Conditions
Monthly averages for ALERT, 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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