The 1999 Bash at the Beach was the sixth Bash at the Beach professional wrestling pay-per-view (PPV) event produced by World Championship Wrestling (WCW). The event took place on July 11, 1999, from the National Car Rental Center in Fort Lauderdale, Florida. As of 2014, the event is available on the WWE Network.

Nine matches were contested at the event, including one dark match. In the main event, Randy Savage and Sid Vicious defeated Kevin Nash and Sting for Nash's WCW World Heavyweight Championship, with Savage pinning Nash to win the title. In other prominent matches, Buff Bagwell defeated Roddy Piper in a boxing match, The Jersey Triad (Diamond Dallas Page, Chris Kanyon and Bam Bam Bigelow) defeated Chris Benoit and Perry Saturn in a handicap match to retain the WCW World Tag Team Championship, and Fit Finlay won the Junkyard Invitational.