Summer Solstice 2025 Day. Summer solstice 2025 (beginning of astronomical summer) on the day of the summer (june) solstice, the solar disk, moving along the ecliptic, will fall into its northernmost point and will be. For the northern hemisphere, it will happen on june 21, 2025.
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). For the northern hemisphere, it will happen on june 21, 2025.