Portugal participated at the 2018 Summer Youth Olympics in Buenos Aires, Argentina from 6 October to 18 October 2018.
Portugal qualified one boat based on its performance at the 2018 World Qualification Event.
Portugal qualified a mixed pair based on its performance at the 2018 Acrobatic Gymnastics World Championship.
Portugal qualified one gymnast based on its performance at the 2018 European Junior Championship.
Portugal qualified one gymnasts based on its performance at the 2018 European Junior Championship.
Portugal qualified one boat based on its performance at the Techno 293+ European Qualifier.
Portugal qualified two athletes based on its performance at the 2018 European Youth Olympic Games Qualifier.