July 21, 2026 · Oeiras, Portugal
Sunset in Oeiras today is at 20:59. Day length is 14h 29m. See below for sunrise, solar noon, dawn and dusk — all times calculated astronomically for Oeiras's coordinates and updated daily.
Oeiras lies at 39°N. At this latitude, day length varies moderately — from around 10 hours in midwinter to 14–15 hours in 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 Oeiras.
The longest day in Oeiras is around 14h 52m (around June 21). The shortest is around 9h 27m (around December 21). Days are currently getting shorter — losing about 1 minute per day.
| Month | Sunset | Sunrise | Day length |
|---|---|---|---|
| January | 17:39 | 07:55 | 9h 44m |
| February | 18:14 | 07:31 | 10h 43m |
| March | 18:43 | 06:51 | 11h 52m |
| April | 20:13 | 07:03 | 13h 9m |
| May | 20:42 | 06:27 | 14h 14m |
| June | 21:04 | 06:13 | 14h 51m |
| July | 21:03 | 06:24 | 14h 38m |
| August | 20:35 | 06:51 | 13h 44m |
| September | 19:49 | 07:18 | 12h 31m |
| October | 19:02 | 07:46 | 11h 16m |
| November | 17:26 | 07:19 | 10h 7m |
| December | 17:17 | 07:48 | 9h 29m |