How Many Days Until Summer From Today?
— days until the summer solstice. In the Northern Hemisphere, astronomical summer begins around June 20 or 21 — the longest day of the year.
There are two ways to define "summer". Astronomical summer starts at the solstice (June 20–21). Meteorological summer, used by most weather services, runs June 1 to August 31 as fixed dates. This page counts to the astronomical start.
Astronomical vs. Meteorological Summer
Astronomers mark summer by Earth's orbital position — the solstice, when the Northern Hemisphere tilts most toward the Sun. That's typically June 20 or 21. Meteorologists use fixed dates (June 1 start) because it makes seasonal climate data easier to compare year-over-year.
If you're planning around "summer vibes" — warm weather, vacation, beach days — meteorological summer is probably the more relevant definition. If you're tracking daylight, it's astronomical.