Clooney suffered a broken rib and scrapes while his passenger, Sarah Larson, broke her foot in the 3:30 p.m. collision. The two were treated at Palisades Medical Center in North Bergen and released, Clooney's spokesman, Stan Rosenfield, said.
"He's doing fine," Rosenfield said. "He has a broken rib, it's very painful and it'll take a long time to heal."
Clooney and Larson were traveling north and sped up to pass on the right of a 1999 Mazda Millenia that was preparing to make a right turn, said Weehawken police Sgt. Sean Kelly. Both were wearing helmets.
It wasn't known whether the Mazda's driver, whose identity was not immediately released, used a turn signal, Kelly said. The accident was under investigation.
"It's a he-said, she-said right now, but you can't pass on the right in Weehawken or anywhere in Jersey," Kelly said.
Rosenfield said the accident occurred when the vehicle signaled a left-hand turn, but turned right and struck Clooney's motorcycle.
"The car signaled left. George was riding to the right. The driver decided to make an abrupt right turn and clipped George," he said.
The 46-year-old actor was in the New York area to film the dark comedy "Burn After Reading," co-starring Brad Pitt, John Malkovich and Frances McDormand.
Clooney's recovery shouldn't interrupt the production's schedule, Rosenfield said.
Clooney's latest film, "Michael Clayton," will be released next month. He and Larson have been spotted together at several film festivals and movie premieres in recent weeks.