Generally the region benefits from an ocean climate.
There are however specific microclimates that can be explained by the influence of 3 factors:
The proximity of the Atlantic Ocean
The proximity of the Pyrenees Mountains
The proximity of the Gascony region with its more continental climate.
These natural elements create a certain climatic complexity. Winters are generally mild. Rainfall is concentrated in the spring and summer. Annual rainfall is rather high (900 to 1000 mm/year), essential for the Tannat’s growth cycle. Autumns are warm and dry, often characterised by wide temperature variations and by the Foehn effect (hot southerly wind) which encourages optimal maturing of the vines.