Monsoon was founded in 1973 by Peter Simon following a period of selling shaggy woollen coats on the Portobello Road and hand block printed clothes from Rajasthan to anyone who would buy them. The original focus was always clothes with an ethnic origin from faraway places, including unusual dresses from Afghanistan and countries en route.

In May 1973, the first Monsoon shop opened in Beauchamp Place, Knightsbridge, London. In 1984, Accessorize evolved as an exciting and a strongly differentiated High Street concept for fashion accessories in an adjoining shop to the Monsoon, Covent Garden Piazza branch.