Summer Solstice 2025 United States 2025. Starts on march 20, 2025, at 11:06 pm and lasts until june 20, 2025, at 4:51 pm (93 days) summer:. What exactly is the summer solstice?
The times of the solstices mark the beginning of summer and winter. In 2025, the summer solstice in the northern hemisphere will occur on june 20, 2025, at 10:42 pm edt (or 2:42 am utc on june 21).