HMS Perseus Wreck | A Deep War Grave

Site Overview

The HMS Perseus is one of the most poignant wreck dives in Greece: a British T-class submarine that sank in 1941 and now rests largely intact on the seabed between Kefalonia and Zakynthos at 48–52 m. As a designated war grave, the submarine is treated with deep respect — it is never penetrated and nothing is removed, but from the outside it is a remarkable sight, its cylindrical hull and conning tower still recognisable after eight decades underwater. Gorgonians and algae cloak the metal, groupers and conger eels patrol the structure, and the clear Ionian water gives a haunting, cathedral-like view of the whole vessel. Reaching it is a serious technical undertaking requiring decompression training and helium mixes, but for those qualified it is a bucket-list dive that combines history, engineering and the quiet drama of a deep wreck. The HMS Perseus stands as a moving memorial and a testament to the island’s wartime past. HMS Perseus Wreck sits within Ionian Islands – Kefalonia & Ithaca and is best described as a wreck and war-grave dive. The water here is typically clear, and the profile — from around 40 m down to 52 m — gives technical divers a rewarding range of routes. Among the life you can expect are Mediterranean Grouper, Conger Eel, Anthias, Mediterranean Moray, Bogue. The site rewards a slow, observant approach, and good buoyancy keeps both diver and reef safe. With sensible planning around weather and boats, it ranks among the more memorable stops on a Greek diving trip.