Dunwich is a village and civil parish in Suffolk, England. It is in the Suffolk Coast and Heaths AONB around 92 miles (148 km) north-east of London, 9 miles (14 km) south of Southwold and 7 miles (11 km) north of Leiston, on the North Sea coast.In the Anglo-Saxon period, Dunwich was the capital of the Kingdom of the East Angles, but the harbour and most of the town have since disappeared due to coastal erosion.