Summer Solstice Australia 2025. Find sydney march and september equinox, june and december solstice. This page provides date and local time for summer solstice in the year 2025 for sydney, new south wales, australia.

The northern summer solstice happens when earth’s tilt toward the sun is at a maximum and the sun is directly over the tropic of cancer, which is located at 23.5 degrees north latitude. This is the first day of astronomical summer and occurs as the sun reaches its most.