When Is Summer Solstice 2025. The summer solstice occurs when the tilt of a. In 2025, the summer solstice will occur on june 21, at 02:42 gmt in the northern hemisphere, and on december 21, 2024 at 09:20 gmt in the southern hemisphere.
Summer 2025 starts on friday, june 20th in the northern hemisphere, with the first day of summer being the longest daylight day of the year with the earth’s axis having reached. The summer solstice is a natural astronomical event that happens when the earthโs axial tilt is at its maximum inclination toward the sun (at around 23.44 degrees).