Sully Island
SULLY ISLAND
Most people in Wenvoe will know of Sully Island and many will have visited it, but for those who do not know it, here are some facts about it. It is a small tidal island of 14.5 acres by the hamlet of Swanbridge. It is located 400m from the shore and midway between Penarth and Barry and is registered as a Site of Special Scientific Interest. Sully Island is one of 43 tidal islands that can be reached on foot from the mainland of Great Britain.
Over the years many people who have walked over to the island at low tide have been caught out as the incoming tide rushes over the rocky causeway. Some have been rescued by a lifeboat from Penarth RNLI and some have waded back through the waves, which is not a good idea, and some people have drowned. The danger is that the rise in the sea level can be as much as 6 feet, almost 2 metres in one hour. To make it worse the rise is so fast on the seaward side of the causeway, the tide has to go around the island, where the level is several inches lower and when the tide starts to run across the causeway it forms a race, or rapids, which becomes much stronger as each minute passes. It is strong enough to sweep you off your feet, especially as underfoot the uneven, rocky surface, covered in seaweed is very slippery. So, nobody should ever attempt to cross to the mainland when the tide is close to running across the causeway – even though the path might be clear and beckoning.
There have always been warning signs to make people aware of the dangers, but in recent years National Resources Wales has installed a board, with a traffic light system, which tells visitors when it is safe to cross, and when it would be too dangerous.
Some people have slept overnight on Sully Island to enjoy having the island to themselves, and the feeling of isolation. Then at high tide, they can marvel at the waves crashing against the rocks with spray flying high in the air. In the trips we have made to the island, there has not been much litter as people realise that they need to take any rubbish back with them.
Looking back in time there is evidence that the island was frequently visited by both Romans and Vikings. There is archaeological evidence of the remains of a Saxon fort occupying the eastern end of the Island, on the summit of which is a Bronze Age barrow. It has been suggested by some that this was an armed stronghold, but it was more likely to have been a defended residence and farm homestead.
During the 13th century, the island was the base for Alfredo de Marisco, a Norman pirate known locally as The Night Hawk. Over the centuries the island was well known for its involvement in the local smuggling trade. Smuggling was an endemic problem along the Glamorgan coastline and a constant headache for the port authorities of the Bristol Channel, especially during the eighteenth century. Criminal gangs sought to profit by smuggling in contraband from the Continent and avoiding the high tax imposed by the Government. Alcohol and tobacco were the most smuggled contra-band, but the smugglers would attempt to conceal anything which made a profit.
There have been several shipwrecks around the island over the years owing to the tricky tides and narrow access. Several sources record that the famous Antarctic survey vessel, the SY Scotia, was wrecked on the island on 18 January 1916. Local elderly residents from as far away as Barry re-member arriving at Swanbridge as children, with sacks, to harvest coal spilt on the foreshore from the wreck, over several weeks. A skeleton of a wreck is still visible on the island’s north foreshore facing Swanbridge, but this vessel’s keel is too short to have been the Scotia.
Sully Island is fascinating and if you are fit and agile take a walk over there and enjoy a drink at the Captain’s Wife on your return.