The team disclosed the injury Friday, saying it was discovered recently during his offseason training.
"Patrick Kane sustained a left wrist injury which came to light recently during his offseason training," team physician Dr. Michael Terry said in a statement. "He will undergo surgery on Tuesday to repair a scaphoid fracture. We anticipate a full recovery in 6-8 weeks and in time for training camp. We do not anticipate any long-term issues."
Kane said he injured the wrist during the second-to-last game of the regular season against the Red Wings.
"It was bothering me for a while. Lifting and those sorts of things didn't help it," he said. "It was obviously shocking (needing surgery) but I've grown to accept it and happy to be getting it fixed."
Kane thought the wrist was getting better, but suspects that his offseason workouts may have contributed to aggravating the injury.
"It bothered me in the playoffs a little bit. We checked it out. There was no fracture," he said. "I knew something was wrong so I'm guessing working out, skating, shooting pucks, those kind of things put more pressure on it. Probably made it a little bit worse."
Blackhawks general manager Stan Bowman would prefer to have his star rehab during the summer.
"We just found out about it, within the last day or so. It was sore, he got it checked out and it turned out it needed to be fixed," he said. "You don't want injuries but if you're going to have them, summertime is the best time."
Kane missed two days of practice in February with the flu, and was also sidelined earlier in the season with an ankle injury. He had 73 points in 73 games last season.
Information from ESPNChicago.com's Jesse Rogers and The Associated Press was used in this report.