Alastair Forsyth was born on February 5th, 1976 in Glasgow, Scotland. He was the Scottish Amateur Stroke Play Champion in 1996. He initially started at the age of 10 and turned pro in 1998. In his first full year as a pro he won the Mastercard Tour and the qualifying school.

He has been a member of the European Tour ever since. He finished 46th in his rookie season. He has one victory to his name which came at the Carlsberg Malaysian Open in 2002. His best season came in 2003 when he finished 19th on the order of merit.