Aeolian systems play an important role in palaeoclimatic studies, allowing the inference of arid regions in different geological periods, in addition to being the best records for acquiring palaeowind data. Morphodynamic reconstruction of ancient aeolian dunes is extremely important for understanding the local wind regime. This study aims to contribute to the morphodynamic reconstruction of aeolian deposits of the Aracare? Formation in response to Gondwana?s palaeoclimatic variations and to indicate the prevailing wind regime. Permian Aracare? Formation is located in the Sergipe-Alagoas Basin, northeast region of Brazil, and exhibits sand accumulation of successive sets of aeolian cross-strata which are interpreted as dry aeolian system. Aracare? Formation is characterized by smaller cross-bedded sets of barchanoid dunes at the base that are overlaid by larger cross-bedded sets of transverse dunes. Aeolian cross-strata show a repetitive alternation of grainflow and wind-ripple packages, separated by reactivation surfaces indicating seasonal variations in wind direction. Cross-strata mean vectors dip consistently towards ESE when corrected for the palaeogeographic position of the Lower Permian. Cyclic stratification pattern suggests an alternation of westerly transverse winds responsible for dune migration, followed by reverse winds that caused dune reworking and led to the formation of reactivation surfaces and the related deposition of wind-ripple. Sometimes, reverse winds are more intense (storms?), strongly eroding the lee face of the aeolian dunes, generating master reactivation surfaces. The comparison between the wind patterns of Aracare? Formation and Sakmarian climate models showed good correlation with disposition of westerlies wind regime in mid-latitude in Gondwana landmass.