SEGONTIUM (SIRGONTIUM)
Protected Area
Aberffraw Bay
Why dive here
With 118+ marine species recorded in the area - including dolphins, dwarf minke whales, humpback whales, ocean sunfish (mola mola) and orcas - SEGONTIUM (SIRGONTIUM) offers some of Northumberland & Northeast's richest wreck diving.
Segontium, often referred to as Sirgontium by the locals, is one of those wrecks we’ve returned to time and again. It’s a fishing vessel, 30.5 metres long, sitting upright at 29 metres. She went down in 1984, so she’s had plenty of time for the ocean to reclaim her. We love how intact the structure remains, considering the often-turbulent Northumberland waters. You can still make out the wheelhouse, the hold, and even parts of the deck machinery, all encrusted with dense plumose anemones, their white tentacles swaying gently in the subtle current. Dropping down, the visibility can be a bit hit or miss, but when it’s good, the sheer density of life here is impressive. Ling often lurk in the shadowed corners of the hold, and conger eels peer out from beneath collapsed sections of plating. Our favourite spot is exploring the stern, where you’ll find huge clusters of dead man's fingers coral and, if you’re lucky, a curious grey seal might make a fleeting appearance. It’s a fantastic dive for experienced wreck enthusiasts who appreciate a historical vessel colonised by thriving marine life. The Segontium might not have the dramatic history of a battleship, but its character and the life it now supports make it a truly rewarding dive.
Typical SEGONTIUM (SIRGONTIUM) 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 29m - Advanced Open Water certification recommended.
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.
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