Summer Solstice 2025 Australia 2025. The summer solstice falls between december 21 and 23 in the southern hemisphere each year. The summer solstice is the first day of astronomical summer, although the more logical metrological summer begins december 1st / june 1st (depending on hemisphere).

This page provides date and local time for summer solstice in the year 2025 for sydney, new south wales, australia. The summer solstice is also known as the longest day, which is perhaps the most notable feature.