The study use Conductivity, Temperature and Depth (CTD) measurement (including seals-borne CTD) to describe the seasonality of the stratification and mixing of one of the southernmost Fjords of Patagonia: The Almirantazgo Fjord. The region, typically tidal was indicated as the most important forcing for mixing the inner-sea of Tierra del Fuego, here the study shows that the persistent an episodic strong along-fjord winds could perturb the pynoclyne and rivals to the estuarine circulation.