Crown solicitor Ella Collis described the acts as "brazen, arrogant and entitled".
Judge Ingram said the "completely unwanted sexual attention" had "significantly affected" the women, and this would likely continue "for many years to come".
He did not, however, accept the Crown's argument that the offending was premeditated.
Instead, he deemed it "opportunistic".
Ingram said the hairdresser had "a substantial book of clients" and evidence suggested he was "an engaging, personable man".
But he abused the trust of the very clients he had attracted.
"I have little doubt that the responsibility [for the offending] will become increasingly obvious, as will the consequences."
To denounce Smith's actions, Ingram said he could not give a sentence of home detention, it had to be imprisonment.
