Police were called after the victim, a man in his 20s, was found with a single stab wound on a grassed area near Roffey Close around 10.20pm.
The man was approached from behind and thrown from his bike to the ground by two men wearing balaclavas. He was then believed to have been dragged along the ground before being stabbed.
Two men were seen making off from the scene towards the recreation area near Sangers Drive shortly afterwards.
The victim was taken to hospital where he remains in a serious but stable condition.
A spokesperson for Surrey police said “Enquiries are underway and want to reassure you that we are doing everything we can to identify those responsible.”
“However, we need your help – if you witnessed the attack, or you have any dashcam or doorbell camera footage or any other information, please DM us straightaway quoting reference PR/45220087990.”