☀️How Many Days Until Summer?

✓ Tested & verified Updated: Aug 5, 2026 How we calculate this

Astronomical summer in the Northern Hemisphere begins around June 20–21, at the summer solstice

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When exactly is Summer?

Astronomical summer in the Northern Hemisphere begins around June 20–21, at the summer solstice. The live counter above shows exactly how many days, hours, minutes and seconds remain until the next one, worked out in your own time zone.

Astronomical summer in the Northern Hemisphere begins at the summer solstice, around June 20–21 — the longest day of the year, when the sun reaches its highest point in the sky.

Meteorologists use a simpler definition: meteorological summer runs from June 1 to August 31. In the Southern Hemisphere the seasons are reversed, with summer starting in December.

Upcoming dates

Year	Date	Day of week
2027	June 21, 2027	Monday
2028	June 21, 2028	Wednesday
2029	June 21, 2029	Thursday
2030	June 21, 2030	Friday
2031	June 21, 2031	Saturday

Frequently asked questions

When is Summer?

Astronomical summer in the Northern Hemisphere begins around June 20–21, at the summer solstice.

What is the difference between astronomical and meteorological summer?

Astronomical summer starts at the solstice (around June 20–21) and is based on Earth’s position relative to the sun. Meteorological summer is fixed to whole months — June, July and August — which makes climate statistics easier to compare.

How we calculate this

The countdown runs live in your browser and updates every second against your device clock, so it is always correct for your own timezone. The target is the next occurrence of Summer (Astronomical summer in the Northern Hemisphere begins around June 20–21, at the summer solstice). Dates for fixed holidays follow the civil calendar; dates for moveable events are taken from the official published dates listed on this page.