The Wales national rugby union team toured Argentina in May–June 1999. They played five matches, including two tests against the Argentina national team. The tour served as preparation for the 1999 Rugby World Cup, which Wales hosted in October and November that year.
Wales won the test series 2–0, winning the first test 36–26 and the second 23–16 to claim their first series victory in the Southern Hemisphere; however, they only won one of their three tour matches, beating Tucumán 69–44 but losing 31–29 to Buenos Aires and 47–34 to Argentina A.