southerly wind
A classical, literary term for a wind blowing from the south, often with a gentle, warm connotation. Not used in everyday weather reports; modern Japanese would use 南風 (みなみかぜ/なんぷう).
The word 凱風 often appears in classical Chinese poetry.
From Chinese 凱風 (kǎifēng), a classical term for a southerly wind, often associated with warmth and nurturing in ancient poetry. The exact historical derivation is uncertain; the spelling is conventionally associated with this meaning.