Sully Island, Tidal island and conservation area in Vale of Glamorgan, Wales.
The 6-hectare island stretches 450 meters in length, featuring rocky cliffs, grassy paths, and a natural causeway connecting it to the mainland.
During the 13th century, Norman pirate Alfredo de Marisco established a base on the island, which later became a center for smuggling operations.
Archaeological discoveries reveal a Saxon promontory fort and Bronze Age barrow on the eastern end, indicating early human settlements on the island.
Access to the island requires careful timing as the rocky causeway remains visible for only three hours during low tide periods.
The wreck of Antarctic vessel SY Scotia occurred near the island in 1916, with local children collecting coal from its remains for years afterward.
Location: The Vale of Glamorgan
GPS coordinates: 51.39543,-3.19580
Latest update: May 16, 2025 16:18
Cosmeston Lakes Country Park
2.3 km
Lavernock Battery
2.2 km
Sully Hospital
2.9 km
Sea Roads
4 km
Penarth Coast
3 km
Barry Lighthouse
4.4 km
St Peter's Church
3.6 km
Church of St Lawrence
2.2 km
Church of St John the Baptist
2.3 km
Sully Island
32 m
Dinas Powys Library
4.4 km
The Red House
4.1 km
No.1 Tower Hill Avenue
4.5 km
Sully and Lavernock Library
1.5 km
No.13 Marine Parade (Greylands)
4.2 km
No.2 Tower Hill Avenue
4.5 km
No.14 Marine Parade (Leigh Holme)
4.2 km
Swanbridge House
554 m
No.24 Archer Road
4.4 km
Hayes Farm Windmill
3 km
Dinas Powys
4.5 km
No.25 Victoria Road,Archer Road
4.4 km
No.20 Victoria Road (St.Anne's)
4.5 km
No.20 Archer Road
4.4 km
Old Cogan Hall Farm
3.6 km
Cwrt-Y-Vil Grange
3.4 km
No.22 Archer Road
4.4 km
No.22 Victoria Road (St.Margaret's)
4.5 kmReviews
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