HMS Fiona
Protected Area
John o' Groats
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) - HMS Fiona offers some of Scapa Flow, Orkney's richest wreck diving. Water ranges 8-14°C, warmest July, August, September.
We admit it, the HMS Fiona isn't the showboat of Scapa Flow, but don't let that fool you. This isn't one of the big German battleships, it’s a Blockship, sunk deliberately in 1915 to protect the harbour. And that's exactly why we love it. The wreck sits upright, relatively intact, often bathed in that moody Scapa Flow light that filters down to around 15-20 meters. You can really get a sense of its original form, especially the bow and stern, which are still quite defined. Diving Fiona means navigating through her superstructure, where common lobsters peek from crevices, and the metalwork itself is now a home for North Sea tube anemones and those translucent light-bulb sea squirts. We’ve found cowfish drifting lazily past the deck guns, and the schools of small fish here can be surprisingly dense, darting around the mast, which still points towards the surface. It’s a calmer dive than some of the deeper, more exposed Scapa wrecks, making it a brilliant introduction to the area’s history, and frankly, a bit of a relief on a choppier day. It really suits divers who appreciate exploring a wreck with a clear structure and a decent amount of ambient light.
Safety Notes
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.
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Conditions
Ocean conditions, forecast and tides for HMS Fiona
HMS Fiona Ocean Conditions
Monthly averages for HMS Fiona, 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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