What Time Does Nautical Dusk End Today?
Tonight's nautical dusk window for your location is shown above with a live countdown. The deep-blue band on the right of the animated sun path marks the evening stretch when the sun sinks from 6° to 12° below the horizon — the last of the sea light before the sky goes fully dark.
What Is Nautical Dusk?
Nautical dusk is the end of evening nautical twilight — the moment the setting sun reaches 12° below the horizon. By then the horizon line has dissolved into the dark and the brighter stars are well established; a navigator can no longer take a reliable sextant sight. After nautical dusk comes astronomical twilight, and once the sun passes 18° down it's true night.
Nautical Dusk vs Sunset
Sunset is the sun leaving; nautical dusk is the light leaving. At mid-latitudes nautical dusk lands roughly an hour after sunset, and the gap grows with latitude. It's a useful marker for anyone who works with the last of the light — sailors, photographers chasing the final glow, or anyone timing a return before full dark.
FAQ
When is nautical dusk tonight?
The card above shows the next nautical dusk with a live countdown — if tonight's has passed, it rolls to tomorrow evening automatically.
Is nautical dusk the same as nautical twilight?
Nautical dusk is the end of the evening nautical twilight window. "Dusk" names the closing moment; "twilight" names the whole stretch.
How is nautical dusk calculated?
From the sun's elevation, computed for your location using only your timezone — no location permission needed. Tap "Use precise location" for street-level accuracy.
