The concert band from the Melbourne private school is stopping at Shepparton on its way to Canberra.
There will be separate performances from the two bands before they finish together.
All money raised on the day will be donated to local charity People Supporting People.
Shepparton Brass and Wind Band secretary Leona Gibbs said it would be an afternoon of light entertainment.
“We're performing hits from Jersey Boys, a clarinet solo of Blue Moon and other crowd favourites,” she said.
“Wesley approached us and said they'd be keen to play with us and help donate money to a local charity.
“We suggested People Supporting People because they're well known in town and do a great job supporting the homeless.
“It would be great if people can come along to support Wesley for stopping in Shepparton, us and a local charity.”
The performance is at Shepparton High School this Saturday, November 30, from 3 pm. Cost is a gold coin donation.