Cazal Viel is located in the South of the Saint-Chinian appellation, at the base of the Caroux mountains and at 150 m altitude.
The climate of this terroir is typically Mediterranean. Characterized by mild winters, dry and hot summers and localised rainfall, especially in autumn from September to December (annual rainfall is around 800 mm).
On the other hand, summers are often very dry, and even barren in the garrigue backcountry, with only some rainfall caused by thunderstorms in August. The dominating winds are the Tramontane, a cold, dry wind that blows away the clouds, and the marine wind which is humid, bringing with it clouds and humidity.
The average amount of daily sunlight is 7:10, much higher than the national average which is 4:46. The average annual temperature is 14.2°C. The region benefits from a high range of temperatures.