The Walgett Charity Bushmens Carnival is the latest Western Plains rider event to fall to this year's usual rains after its committee was forced to cancel the rodeo this morning.

The Walgett Showground has been washed out, with so far almost 30 millimeters of rainfall in the town this week.

The committee had earlier ruled out camp draft events at the carnival due to wet weather barring access to cattle donor properties.

Committee secretary Jordy Fenwicke confirmed the decision this morning to the Western Plains App.

"The rodeo arena itself is actually laying water. It has a pool of water in the corner," Ms Fenwicke said.

"And then the grounds itself, where we set up our bar and all our grandstands, are very spongey underfoot.

"It's just probably not going to be safe and we'll probably make too much of a mess trying get all the relevant gear in there to run the show."

The action from the 2023 carnival. PHOTO: Coverdale Media

Around 300-350 riders had been expected to jostle for an over $10,000 prize pool across the rodeo and campdraft from 16-18 August, with the annual show averaging roughly 1000-1500 spectators post-COVID.

It's not the only rodeo and camp draft rocked by poor weather this year.

Coonamble was forced to postpone its flagship camp draft event over the June long weekend after rains barred access to cattle properties, although it was still able to hold its annual rodeo.

Their campdraft is now planned for 6-8 September.

 Ms Fenwicke said it wasn't possible to postpone the Walgett carnival.

"We've looked at other dates, but with where we live obviously the further we get through October the closer we get to harvest, and it's just too hard for our volunteers to help out because they're just too busy," she said.

"We'll clash with too many other local events in the next few weeks if we do try to postpone, so we have to cancel. We'll run again next year.

"We did try make this decision as soon as possible because people normally start to roll in today and tomorrow."

She said 2023 Toyota Star Maker Grand Finalist Robbie Mortimer, who was to set to play at the showground on Saturday, will still take the stage next year.