July 21, 2026 · Dún Laoghaire, Ireland
Sunset in Dún Laoghaire today is at 21:39. Day length is 16h 15m. See below for sunrise, solar noon, dawn and dusk — all times calculated astronomically for Dún Laoghaire's coordinates and updated daily.
Dún Laoghaire lies at 53°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 Dún Laoghaire.
The longest day in Dún Laoghaire is around 16h 59m (around June 21). The shortest is around 7h 30m (around December 21). Days are currently getting shorter — losing about 3 minutes per day.
| Month | Sunset | Sunrise | Day length |
|---|---|---|---|
| January | 16:35 | 08:33 | 8h 1m |
| February | 17:33 | 07:46 | 9h 47m |
| March | 18:26 | 06:43 | 11h 43m |
| April | 20:22 | 06:29 | 13h 54m |
| May | 21:16 | 05:28 | 15h 48m |
| June | 21:54 | 04:57 | 16h 57m |
| July | 21:47 | 05:15 | 16h 32m |
| August | 20:57 | 06:03 | 14h 54m |
| September | 19:45 | 06:57 | 12h 49m |
| October | 18:33 | 07:49 | 10h 44m |
| November | 16:32 | 07:48 | 8h 44m |
| December | 16:07 | 08:33 | 7h 34m |