Leading Senior Constable Martin Howells, of Colac Police, said the woman returned a reading of 0.128 when she was intercepted in Murray Street at 9pm on Saturday night.

"She lost her licence immediately and received a $700 fine," Leading Senior Constable Howells said.

"She had two other females and a child in the car with her - she was pretty disgusted with herself."

The 30-year-old Melton woman was one of two drivers nabbed over the limit in Colac overnight.

Senior Constable Howells said a 44-year-old male from the Apollo Bay region was also caught drink driving at 2.15am.

He also lost his licence and will appear in court at a later date.

Senior Constable Howells said it was extremely disappointing to have two people return positive alcohol tests, especially with the high volume of traffic on the roads due to the end of the school holidays.

"We're out every weekend and we will continue to detect drink and drug drivers," he said.

Senior Constable Howells urged people to take care and drive to the conditions.

"The weather is expected to be terrible all week and we want everyone to be safe," Senior Constable Howell said.

Have you signed up to The Standard's daily newsletter and breaking news emails? You can register below and make sure you are up to date with everything that's happening in the south-west.