From Longman Dictionary of Contemporary Englishsouthwesterlysouth‧west‧er‧ly /ˌsaʊθˈwestəli $ -ərli/ adjective 1 SGtowards or in the southwest The plane was flying in a southwesterly direction.2 DNHEMa southwesterly wind comes from the southwest
Examples from the Corpus
southwesterly• Almost effortlessly, our bodies acting as sails, the southwesterly surfed us along the coast of Vallay. 