The comic was hospitalized Monday and released on Tuesday, his manager, Howard Lapides, told People magazine.
Green, 34, was standing on rocks when he was hit by a "wall of water," People said.
"I actually tried to lean into (the wave), as if that would keep me in my footing," Green posted on his Web site. It was like leaning into a freight train. And I was gone. I felt my life flash before my eyes," he writes. "Milliseconds later I slammed hard onto the rocks ... I could feel the cracking of bone."
A witness took Green to the hospital.