The PDO Patras zone extends across hilly areas in the northeastern part of the Achaia Regional Unit. The wines produced in this zone are exclusively made from the Roditis variety and can be dry, semi-dry, or semi-sweet. Their production follows the classic white winemaking method, with controlled fermentation temperatures below 20°C. To qualify for the designation "selected" or "reserve," the wine must age for 6 months in oak barrels, and for the designation "specially selected" or "Grand Reserve," it must age for 1 year in oak barrels.
The climate in the region is Mediterranean, benefiting from the altitude and the sea breeze, whether from the Gulf of Patras or the Corinthian Gulf. Despite the high rainfall in the area, the sloping soils ensure good drainage. Additionally, the winds that blow through keep humidity levels low, reducing the risk of fungal diseases in the plants.
Viticulture and winemaking in the area date back to ancient times, while large enterprises established in more recent history, such as the Achaia Clauss winery, have bolstered the cultivation of vineyards in the region.