Wreck of Cairnmona
Protected Area
Loch of Strathbeg
Why dive here
With 140+ marine species recorded in the area - including blue whales, dolphins, dwarf minke whales, humpback whales and ocean sunfish (mola mola) - Wreck of Cairnmona offers some of Scapa Flow, Orkney's richest wreck diving. Water ranges 8-14°C, warmest July, August, September.
The wreck of the Holland is one of Scapa Flow’s less-dived treasures, and for us, that’s part of its charm. Descending onto this old blockship, you’re immediately struck by its age, the way the steel has softened and been consumed by the cold, green water. It’s not about grand, intact structures here. Instead, you find a wonderfully broken-up vessel, its plates twisted and its holds open to the light. We love exploring the scattered debris field, tracing the outline of what was once a purposeful ship, now a series of dramatic metal sculptures. You’ll encounter surprisingly large common lobsters tucked into crevices, their antennae waving as you pass. The wreck’s surfaces are textured with light-bulb sea squirts and the dark fronds of spiral wrack, creating a vibrant contrast against the corroded metal. It’s a dive that rewards slow, deliberate exploration, perfect for those who appreciate history and the slow reclamation of man-made objects by the ocean. We’d suggest heading here on a quieter day, perhaps an afternoon dive, to truly appreciate the solitude. The visibility can vary, but even in murkier conditions, the wreck’s character shines through.
Typical Wreck of Cairnmona Dive Profile
Illustrative profile based on site depth and type. Actual dive profiles vary - always follow your dive computer and training.
Safety Notes
Depth of 20m - Advanced Open Water certification recommended.
Wreck site - avoid penetration without wreck diving certification. Watch for sharp metal and entanglement hazards.
Cold water this month (avg 13°C). Drysuit or thick wetsuit (7mm+) recommended.
Always perform a 3-minute safety stop at 5m before surfacing.
Reviews for Wreck of Cairnmona
Conditions
Ocean conditions, forecast and tides for Wreck of Cairnmona
Wreck of Cairnmona Ocean Conditions
Monthly averages for Wreck of Cairnmona, sourced from Open-Meteo marine data - nearest station: Open-Meteo marine grid (58.64, -3.16) (8km away)
October Averages
Sea Temperature
13°C
55°F · Range: 11.4–13.8°C
Air Temperature
10°C
50°F
Wind Speed
9.26 m/s
18.0 knots
Atmospheric Pressure
1005.3 hPa
Based on 4 years of monitoring data · Data sources: Open-Meteo marine data
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