Newcastle Knights forward Robbie Rochow fractured his right arm during a contact session at training on Thursday.

After seeing the specialist, Rochow will have surgery this afternoon.

"Saw the specialist and it's a stable fracture in my forearm at the top of the plate that I have in there. Feels ok and I have full movement," Rochow said on Twitter.

"Going to get the plate taken out today and let it heal from there. A bit frustrating but hopefully back out there soon."

Rochow is expected to be sidelined for 8-10 weeks.