Augusta was the second daughter of Charles Frederick, Grand Duke of Saxe-Weimar-Eisenach and Maria Pavlovna of Russia, a daughter of Paul I of Russia and Sophie Dorothea of Württemberg.
While her father was an intellectually limited person, whose preferred reading up to the end of his life was fairy tales, Johann Wolfgang von Goethe spoke of Augusta's mother Marie as "one of the best and most significant women of her time."