[5] The school's theater department offers a student-directed play and musical each year, amassing over 100 participants in total.

Until 2018, the Harbor High Drama department was run by Cathy Warner, who had taught and directed for three decades.

Harbor High also hosts Escapade, a local dance group also run by students.

[7] Harbor lost the Monterey Bay League Championship in 1973 in a close battle with Monterey High School under coaches Claude Sharp, assistants Bob Enzweiler, Bob Nicolaisen and Larry McCook.

Perhaps the greatest Harbor Dynasty was that of Girls' Soccer who won 9 CCS Championships in 14 years under head coach Gerald Pleasant who retired in 2004.