Louw attended and played rugby for Hoërskool Transvalia, which earned him a selection to the squad for the Under-18 Craven Week. After school, Louw moved to Bloemfontein to join the , representing them at Under-19 and Under-21 level. He was also called up to the South Africa Under-20 squad, representing them at the 2019 World Rugby Under 20 Championship in Argentina.