Music festival Southbound has announced there will be a special benefit show at HBF Stadium in Perth to help raise money for those affected by the South West bushfire.

National and international artists were already on route for the three-day event that was supposed to start on December 8 but was forced to cancel because of safety concerns.

"We've been overwhelmed with the support shown over the last 24 hours since our announcement that Southbound 2016 has had to be cancelled due to high fire risk within the area," Sunset Events' organisers said in a statement.

"A bunch of our incredible international and local artists who were en route to entertain Southbound patrons have offered to play a special benefit show to help raise much needed funds for those affected by the bushfire situation in the South West."

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All of the net proceeds will be donated to the victims of the South West bushfires.

The six-hour concert is planned for Sunday, with gates opening at 5:00pm, and will feature bands Bloc Party, Disclosure DJ Set and Birds of Toyko, with more information on other bands and times yet to be released.

In their statement, Sunset Events also said that feedback had been received from patrons who wanted to donate their ticket refund to those affected by the fire.

Moshtix patrons will soon be able to donate their Southbound ticket refunds or any selected amount, to a nominated bushfire relief fund.

Information on refunds on all tickets and how to donate to the cause will be released Wednesday, January 13.

Sunset Events said they were also working to transport excess food from the site to fire-devastated communities.

"Our hearts go out to the local communities and families," the statement said.

Tickets for the event will go on sale at Ticketmaster from 2:00pm today.