Beale has broken his knee cap in an eighth minute collision with Roosters prop Jared Waerea-Hargreaves and was taken to hospital immediately.
Warriors assistant coach Stacey Jones says it's a very nasty injury.
Beale's been advised to stay in Sydney to be operated on, while the Warriors will remain in the city to prepare for Saturday's match with the Cronulla Sharks.
The Sharks have beaten the Dragons 18-12 to move to eighth spot.
NRL COVERAGE POWERED BY MACHINERY HOUSE - IN A LEAGUE OF THEIR OWN