The northern part of Friuli Venezia Giulia is dominated by the Julian Alps and the Carnic Prealps. These mountain ranges provide a natural barrier against cold northern winds and create a unique microclimate that is favorable for viticulture. The mountainous terrain also contributes to diverse soil types, including marl and sandstone, which are ideal for grape growing.

To the south, the region is bordered by the Adriatic Sea. The maritime influence moderates the climate, providing mild winters and cool summers. This helps maintain a balanced ripening process for the grapes, preserving their acidity and aromatic qualities.