Stevenson was born in 1991.[3] She obtained her secondary education at Tauranga Girls' College,[4] and then obtained a Bachelor of Science (BSc) from the University of Waikato.[5] As of 2017 she is a stay at home mother to son 'Ted'.
At regattas in Varese (Italy) and Lucerne (Switzerland) in 2015, she competed in the double sculls with Eve MacFarlane, winning gold in both finals.[7][8] The pair went to the 2015 World Rowing Championships held at Lac d'Aiguebelette in Aiguebelette, France, and again won gold.[9] Stevenson and MacFarlane qualified for the 2016 Summer Olympics, but were beaten in the semi-finals by the US by 5/100 into fourth place, thus missing the A final.[10] In November 2016, she announced that she would take 2017 off from rowing.[11] She did not return to rowing for the 2018 season either, but has not announced her retirement from rowing.[12]