Summer Solstice Date 2025 Australian. The summer solstice occurs annually across the southern hemisphere between december 21 and 23. In the southern hemisphere, the summer solstice takes place between december 20, 21, 22, or 23 each year.

The exact moment occurs at 8:20 pm. The summer solstice usually occurs on 22 december, but can occur between 21 and 23 december.