Dusk and last light in Boston
Last light (civil dusk) in Boston today fades at 20:39, about 32 minutes after the sun sets at 20:07. The sky is fully dark by astronomical dusk at 22:03. Times for Wednesday, 29 July 2026, in Boston's local time zone.
| Stage | What it means | Local time |
|---|---|---|
| Sunset | the sun dips below the horizon | 20:07 |
| Civil dusk (last light) | sun 6° below, usable light ends | 20:39 |
| Nautical dusk | sun 12° below, sea horizon gone | 21:18 |
| Astronomical dusk | sun 18° below, full night | 22:03 |
Dusk in Boston, stage by stage
Dusk in Boston runs the same three stages as dawn, in reverse. Once the sun sets, civil dusk, the last usable light, lingers until the sun is 6 degrees below the horizon. Nautical dusk follows at 12 degrees, when the sea horizon disappears, and astronomical dusk at 18 degrees, after which the sky is fully dark and the faintest stars appear. How long dusk lasts depends on Boston's latitude: near the equator night falls fast, while at high latitudes dusk can stretch for hours or, in high summer, never fully darken. Every time here is computed for Boston's coordinates and shown in its local time zone.
Frequently asked questions about dusk in Boston
What time is last light in Boston today?
Last light (civil dusk) in Boston fades at 20:39 on Wednesday, 29 July 2026, about 32 minutes after sunset at 20:07. All times are in Boston's local time zone.
What is the difference between dusk and sunset in Boston?
Sunset is the instant the sun disappears below the horizon in Boston; dusk is the fading twilight that follows. Last light (civil dusk) ends the usable light after sunset.
When does it get fully dark in Boston?
Boston reaches full darkness at astronomical dusk, 22:03 on Wednesday, 29 July 2026, when the sun is 18 degrees below the horizon.
Every time on this page is computed from Boston's coordinates with SunCalc, not estimated or looked up from a table.