Officials said a support beam gave way, forcing the closure. One of its timber pilings was also found to be damaged.
Parks and Public Works officials inspected the pier Sunday and determined it was safe for the public.
A city contractor is scheduled to visit the pier Monday to assess the piling damage and make recommendations.
Officials say it's not clear what caused the damage, but high tides and fierce, rogue waves have been pounding the 1700-footlong pier all week.