Wong competed at the GK U.S. Classic at the end of July. She won the all-around by over a point ahead of American Classic champion Kayla DiCello and Junior Pan American champion Bowers with a score of 55.350. She also placed first on vault and floor exercise and third on balance beam. Three weeks later, Wong competed at the 2018 National Championships. With her victory at the Classic, she entered the meet as one of the contenders for the title along with fellow national team members Bowers, DiCello, Tatum, and Sunisa Lee. After two days of competition in which Wong hit all eight of her competitive routines, she became the 2018 Junior all-around champion ahead of DiCello and Lee. Her two-day combined total of 112.250 would have placed her 4th in the senior division. Additionally, she won the national title on floor exercise, was the runner-up on vault behind DiCello and on uneven bars behind Lee, and placed sixth on balance beam. Her performance secured her spot on the junior national team for the second consecutive year.