The 12 year old was one of five girls to go into the U/14 final showdown at Jan Juc in April with a mathematical chance of walking away with the crown.
Confident surfing in tough, low scoring conditions proved enough to clinch the runner's up trophy, behind Phillip Island's Sage Goldsworthy.
"It was really close going into the final. I was confident but nervous," said Bea. "I won my first heat so made it straight through to the final.
"The waves were big and onshore and pretty bad. I caught one wave quickly and knew it was going to be enough to get second."
Bea's Point Lonsdale Boardrider's Club team mate Jay Gladman finished fourth un the boy's U/18 section of the event.
The Australian titles will be held at Phillip Island in December.