Williamstown ( 34°40’S, 138°53’E) is a small South Australian town on the fringe of the Barossa Valley wine-growing region and the Adelaide Hills. It is 51km north east of Adelaide, with an elevation of 310m and an average rainfall of 682.7mm. Williamstown was originally known as Victoria Creek. It has a summer average temperature of 31°C with temperatures often reaching mid 40’s, and a winter average temperature of 15°C with it often dropping below freezing at night.
Williamstown is in the Barossa Council local government area, the state electoral district of Schubert and the federal Division of Wakefield.