July 21, 2026 · Koper, Slovenia
Sunset in Koper today is at 20:47. Day length is 15h 10m. See below for sunrise, solar noon, dawn and dusk — all times calculated astronomically for Koper's coordinates and updated daily.
Koper lies at 46°N. At this latitude, day length varies significantly through the year — from roughly 7–8 hours in midwinter to 16–17 hours at midsummer.
Sunset shifts later through spring and earlier through autumn — changing fastest near the equinoxes and slowest near the summer and winter solstices. See the year chart to visualise how sunset times shift month by month for Koper.
The longest day in Koper is around 15h 41m (around June 21). The shortest is around 8h 42m (around December 21). Days are currently getting shorter — losing about 2 minutes per day.
| Month | Sunset | Sunrise | Day length |
|---|---|---|---|
| January | 16:48 | 07:42 | 9h 5m |
| February | 17:32 | 07:08 | 10h 23m |
| March | 18:11 | 06:19 | 11h 51m |
| April | 19:51 | 06:21 | 13h 30m |
| May | 20:29 | 05:36 | 14h 53m |
| June | 20:56 | 05:16 | 15h 40m |
| July | 20:52 | 05:31 | 15h 21m |
| August | 20:15 | 06:06 | 14h 9m |
| September | 19:19 | 06:44 | 12h 35m |
| October | 18:22 | 07:22 | 11h 0m |
| November | 16:36 | 07:05 | 9h 32m |
| December | 16:23 | 07:39 | 8h 44m |