Wreck of Portugal
Protected Area
Tong Saltings
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 Portugal offers some of Scapa Flow, Orkney's richest wreck diving. Water ranges 8-14°C, warmest July, August, September.
The HMS Starfish is more than just a lump of metal on the seabed, it’s a sombre reminder of wartime history, and we think that's why it holds such a draw. This S-class submarine, sunk in 1940, rests upright, largely intact, which is remarkable for a wreck in these waters. Descending through the North Sea’s often green embrace, the sheer silhouette of the submarine emerges, a dark mass against the sometimes murky backdrop. We love exploring the conning tower, imagining the cramped conditions within. Look closely and you will spot common whelks navigating the plating, while scaldfish often dart from the shadows of a torpedo tube. The wreck itself acts as a massive artificial reef, attracting poor cod and whiting, and we’ve even seen common seals make a curious pass or two. Diving the Starfish often means contending with a bit of current, so it’s definitely one for more experienced divers. Pick a day with good visibility, if you can, to really appreciate the scale of this historical site. It's an imposing dive, certainly, but deeply rewarding.
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.
Reviews for Wreck of Portugal
Conditions
Ocean conditions, forecast and tides for Wreck of Portugal
Wreck of Portugal Ocean Conditions
Monthly averages for Wreck of Portugal, 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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