[3][4] For several years after 1925 she won the annual Austrian five-mile open-water swimming competition Quer durch Wien (Across Vienna) on the Danube that drew some 500,000 spectators.

[7][8][9] Löwy won a bronze medal in the 400 m freestyle at the 1927 European Aquatics Championships in Bologna, Italy, at 16 years of age.

[10][11][1] Until the 2000s, Löwy remained the only Austrian to win a swimming medal, together with Hedy Bienenfeld, who finished third in the 200 breaststroke at the same 1927 European Aquatics Championships.

[13][14] She competed in freestyle at the 1928 Summer Olympics in the Netherlands, at 17 years of age, but did not reach the finals.

[15] Soon after the Anschluss between Germany and Austria in 1938, the annexation of Austria by Nazi Germany before World War II, Löwy fled from Jewish persecutions first to Milan, Italy at the end of 1939, and then to Switzerland in 1944 after her sister was arrested in Milan and deported to the Auschwitz concentration camp, and then to Australia after the war ended.