London · England, United Kingdom
Sunset tonight
16:23 GMT
The Sun's upper edge goes below the horizon
Astronomical darkness
18:18 GMT
Sun 18° down — the sky is fully dark
Sunset is at 16:23 GMT, but twilight lasts about 115 minutes more before the sky is dark enough for faint stars.
Sunset is when the Sun's upper edge disappears. "Dark" for stargazing means astronomical darkness, when the Sun is 18° below the horizon. Times assume a flat horizon at the city reference.
London city reference (51.5085°, -0.1257°, Europe/London), not the whole metropolitan area. Calculated for Saturday, 7 November 2026.
| Evening | Sunset | Civil dusk | Nautical dusk | Fully dark |
|---|---|---|---|---|
| Tonight | 16:23 GMT | 16:59 GMT | 17:39 GMT | 18:18 GMT |
| Tomorrow | 16:22 GMT | 16:58 GMT | 17:38 GMT | 18:17 GMT |
| Mon 9 Nov | 16:20 GMT | 16:56 GMT | 17:36 GMT | 18:15 GMT |
| Tue 10 Nov | 16:18 GMT | 16:55 GMT | 17:35 GMT | 18:14 GMT |
| Wed 11 Nov | 16:17 GMT | 16:53 GMT | 17:34 GMT | 18:13 GMT |
| Thu 12 Nov | 16:15 GMT | 16:52 GMT | 17:32 GMT | 18:12 GMT |
| Fri 13 Nov | 16:14 GMT | 16:51 GMT | 17:31 GMT | 18:10 GMT |
| Sat 14 Nov | 16:13 GMT | 16:49 GMT | 17:30 GMT | 18:09 GMT |
Each row is that date's own evening, computed from local noon with the same engine as the SnapCosmos darkness tool. Darkness is geometry; for cloud, use Tonight hour by hour.
At 51.5° N, the Sun stays less than 18° below the horizon for several weeks around the June solstice, so astronomical darkness is not reached and the table shows "Not reached". Twilight is long all year: it takes far longer to get dark after sunset than near the equator.
Source: GeoNames — LondonThe clocks go back on the last Sunday in October and forward on the last Sunday in March. After the October change, sunset jumps an hour earlier on the clock; the week ahead shows that jump on the evening it happens.
Source: GOV.UK — When do the clocks change?