Ambrose of Milan

For this reason, too, the church, guarding the depth of the heavenly mysteries, repels the furious storms of wind, and calls to it the sweetness of the grace of spring, and knowing that its garden cannot displease Christ, invites the bridegroom, saying, "Arise, O north wind, and come, you south; blow upon my garden, and let my ointments flow down. …

On the Mysteries 9:56 ↗

Bede

"Arise, O north wind, and come, O south wind," etc. For in the north or south, He signifies the tempests of frequent temptations with which the Church was to be buffeted, so that it might become known how much spiritual grace and internal strength it possessed. …

Commentary on the Song of Songs ↗

Robert of Tombelaine

For what is designated by the North wind, which constricts with cold and makes things numb, if not the unclean spirit, who, while he possesses all the reprobate, makes them numb to good work? By the South wind, truly, that is, the warm wind, the Holy Spirit is figured: who, when He touches the minds of the elect, releases them from all numbness and makes them fervent, so that they eagerly perform all good things. For hence it is said: "Turn again, O Lord, our captivity, as a torrent in the South" (Psalm 125:4). …

Commentary on the Song of Songs, Chapter 4 ↗