Factual error: When Brandy returns from outdoors soaking wet, she immediately reaches inside the door and pulls the "light switch", which is just a tangle of wires. Brandy would certainly have received an electric shock.

Continuity: Julie leaves the classroom and walks along, talking to Will, and she has two bags on one shoulder. In nearly every shot the bagstraps change position.

Continuity: Julie goes to the mirror and wipes away some of the condensation from it, still leaving some condensation on it. However when Julie walks away from the mirror, the whole mirror is suddenly clean.

Plot hole: When Julie sees Ben Willis at the club, he has two hands despite losing one in the first movie.

Plot hole: In "I Know What You Did Last Summer", David Egan dates Susie Willis, who they said is Ben Willis' daughter. In the sequel, Ben Willis' wife's name is Susie, and his daughter is Sara Willis.

Audio problem: In this movie, when Ben gets ready to kill someone, he withdraws his hook, and we hear the sound of metal against metal. But he never scrapes or brushes metal, so this is an incorrect sound.