Operator 1 was leaving the protected harbor of Templer Park boat access following another vessel.  Operator 1 was approximately 200 to 300 yards from shore when Operator 1 attempted to leave the wake of a vessel in front of him.  Operator 1 turned to the starboard and his vessel road up on the boat waked and the rear of the vessel tilled starboard causing the vessel to flip and capsize.  All three of the occupants were thrown from the vessel into the water.  The three occupants were not wearing PFDs.  They were picked up by a vessel coming out of the harbor at the same time.  The capsized vessel was pulled back into the harbor where it was pulled from the lake.  No one was injured during the incident.