Organisers for the annual event said ticket sales have been on par with previous years, but they are expecting an attendance boost as the weather warms up on Saturday and Sunday.

Festival director Pam Merrigan said many performances at the festival's 18 stages had been filled to capacity.

"The main venue has been absolutely jam-packed," Ms Merrigan said.

"The weather has been good, and that's going to be a big drawcard in the next few days."

Punters can expect a warm and sunny festival this year, with the mercury set to top 24 degrees on Saturday.

The Bureau of Meteorology has forecast a mostly sunny day on Sunday with a high of 25 degrees, with the chance of showers on Monday and a top of 23 degrees.

It wasn't just the performances that attracted people. Large crowds gathered on Friday morning for yoga and Zumba classes.

After many years being surrounded by a construction site due to the light rail, Ms Merrigan said access to the festival had drastically improved.

"The light rail's going to be a great asset to the festival," she said.

"A lot of the people on Saturday are just going to be riding the light rail from Civic to Gungahlin [for the festival's opening day], but next year it will be a big bonus for us."

The George Jackson Band will headline on Saturday night, and Ms Merrigan said there were many notable acts to watch on the third night of the festival.

Jon Clipshan travelled from Bathurst with his family to continue a long tradition attending the festival.

His wife Gemma has been going since she was a child, while his six-year-old daughter Audrey was at her fifth installment.

Audrey and her four-year-old brother Gilbert performed with their violins for passersby on Friday as people stopped to listen and clap.

Mr Clipshan said he was drawn back each year by the festival's family friendly nature. His kids loved the entertainment it offered, he said.

"They're looking forward to growing up at the festival."