In April 2016, Groves was selected to represent Australia in the 100 m and 200 m butterfly, and 4 × 200 m freestyle relay events at the 2016 Summer Olympics in Rio de Janeiro. This was her first Olympics. She did not qualify for the semi-final in the 100 m butterfly, but qualified fastest for the final of the 200 m butterfly. She won silver, finishing just three-hundredths of a second behind Spain's Mireia Belmonte.