A drink driver has allegedly crashed into parked cars at Port Willunga.

Just before 4pm on Sunday 20 June, police received reports of a Holden sedan hitting a parked vehicle on The Esplanade before the woman behind the wheel drove off.

The driver was followed by a witness as she drove off south along the Esplanade where she then crashed into a second parked car a few hundred metres away.

Two children, an 11 and an 8-year-old boy had just got into the parked car before the crash. Both were treated at the scene by paramedics for shock and minor injuries.

Police arrived and breath tested the 52-year-old woman, who returned an alleged blood alcohol reading of 0.197 - almost four times the legal limit.

She has been reported for drink driving and numerous traffic offences and will be summonsed to appear in the Christies Beach Magistrates Court at a date to be set.

The driver was also issued with an immediate 12 month loss of licence. Her extensively damaged car was towed from the scene.