Fremantle Doctor

Etymology
Named after the city (now within Perth suburbs) of Fremantle, which is the direction the wind comes from to reach central districts of Perth; called the "doctor" for the relief it brings on hot summer days.

Proper noun

 * 1)  The sea breeze that blows from the Indian Ocean over Perth, Western Australia.

Usage notes
Certain other Western Australian towns — for instance Albany, Geraldton, Esperance, Eucla and Perth — have similar "doctors."