Longest and shortest day in Porto
In Porto, Portugal, the longest day of 2026 is around the June solstice on Sunday, 21 June 2026, with 15h 9m of daylight, and the shortest is around the December solstice on Monday, 21 December 2026, with 9h 12m.
| Turning point | Date | Sunrise | Sunset | Day length |
|---|---|---|---|---|
| March equinox | Friday, 20 March 2026 | 06:38 | 18:46 | 12h 8m |
| June solstice | Sunday, 21 June 2026 | 06:01 | 21:10 | 15h 9m |
| September equinox | Tuesday, 22 September 2026 | 07:21 | 19:31 | 12h 10m |
| December solstice | Monday, 21 December 2026 | 07:56 | 17:08 | 9h 12m |
| Month | Sunrise | Sunset | Day length |
|---|---|---|---|
| January | 07:57 | 17:30 | 9h 32m |
| February | 07:29 | 18:08 | 10h 39m |
| March | 06:46 | 18:40 | 11h 54m |
| April | 06:55 | 20:14 | 13h 18m |
| May | 06:16 | 20:45 | 14h 29m |
| June | 06:01 | 21:08 | 15h 8m |
| July | 06:14 | 21:05 | 14h 51m |
| August | 06:43 | 20:33 | 13h 50m |
| September | 07:14 | 19:43 | 12h 29m |
| October | 07:46 | 18:53 | 11h 8m |
| November | 07:22 | 17:15 | 9h 53m |
| December | 07:52 | 17:06 | 9h 14m |
Why the day gets longer and shorter in Porto
Earth's axis is tilted about 23.4 degrees, so as the planet orbits the Sun, Porto leans toward the Sun for part of the year and away for the rest. When it leans toward the Sun the days lengthen and the Sun climbs higher; half a year later the opposite happens. The size of the swing depends on how far Porto sits from the equator: the further away, the bigger the difference between the longest and shortest day.
Frequently asked questions about day length in Porto
When is the longest day in Porto?
The longest day in Porto falls around the June solstice, on Sunday, 21 June 2026 in 2026, with about 15h 9m of daylight, sunrise at 06:01 and sunset at 21:10.
When is the shortest day in Porto?
The shortest day in Porto falls around the December solstice, on Monday, 21 December 2026 in 2026, with about 9h 12m of daylight, sunrise at 07:56 and sunset at 17:08.
How much does day length change through the year in Porto?
Between the longest and shortest day, Porto gains and loses about 5h 57m of daylight. The change is fastest around the March and September equinoxes and slowest near the solstices.
Every figure is computed from Porto's coordinates with SunCalc, not looked up from a table.