The actor, 42, was taken to Stanford Medical Center dazed but not seriously injured, after being rescued by a safety patrolman, according to ESPN.com.
“[Butler] had that 100-yard stare that surfers get after a two-wave hold-down or near-death experience,” reports ESPN.
Surfer Zach Wormhoudt, who was filming with Butler, told ESPN their group was caught off guard by a set of waves that appeared to come out of nowhere.
In March, professional surfer Sion Milosky drowned at the same spot.
Butler is expected to make a full recovery.