Start Of Spring 2025 Australia. When does spring start in australia? Spring equinox 2025 (beginning of astronomical spring) on the day of the spring (march) equinox, the sun crosses the celestial equator, moving along the ecliptic.

Here’s why spring starts when it does and what we can expect from the warmer months. Spring 2025 in australia will begin on sunday, september 1, 2025 and ends on saturday, november 30, 2025.