When Is Equinox 2025 Australia. The beginning of spring corresponds to the spring equinox, which usually falls september 21st or 22nd in. In 2025, autumn equinox in australia (southern hemisphere) will occur on tue, march 20, at sharp 02:07 pm aedt (australian eastern daylight time).

That’s because we chart the seasons based on the meteorological system. The southern hemisphere’s spring equinox will occur this weekend and that means more sunshine on the forecast for australia.