ONEGA
Protected Area
Kelsey Head
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) - ONEGA offers some of Cornwall & Devon's richest wreck diving. Water ranges 10-18°C, warmest July, August, September.
The Onega, a steamship that went down in 1918, lies at a depth of 46 metres off the coast of Cornwall. This is a deep wreck, best suited for experienced divers comfortable with technical profiles. She’s a big girl, 122 metres long, and while the structure is well broken up, the sheer scale of the debris field is impressive. We usually find conger eels tucked into the collapsed sections and plenty of jewel anemones adding colour to the metalwork. It’s a proper dive, one where you feel the history of the place.
Typical ONEGA 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 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.
Nearest Dive Centres to ONEGA
Dive shops near ONEGA
Dive Newquay
Wavecrest Scuba
Seaways Diving
Harlyn Dive School
Karleyth Diving Ltd.
DiveUK
Reviews for ONEGA
Conditions
Ocean conditions, forecast and tides for ONEGA
ONEGA Ocean Conditions
Monthly averages for ONEGA, 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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