When Is The First Day Of Summer 2024 Australia. In southern hemisphere countries such as. This year's summer solstice will occur on saturday, with the day length expected to be 14 hours and 25 minutes in sydney and about half an hour longer in melbourne, according to weatherzone.

This year the summer solstice is the 21st of december 2024. This is the first day of astronomical summer and occurs as the sun reaches its most.