July 21, 2026 · Haikou, China
Haikou has 13h 11m of daylight today. Sunrise is at 06:10 and sunset is at 19:21. All times are calculated astronomically for Haikou's exact coordinates.
Haikou lies at 20°N. Near the tropics, day length stays close to 12 hours year-round, with only minor variation between seasons.
Day length changes fastest near the spring and autumn equinoxes and slowest near the longest day and shortest day of the year. See the year chart to visualise how daylight hours shift month by month for Haikou, or see daylight hours for every day of the year.
The longest day in Haikou is around 13h 21m (around June 21). The shortest is around 10h 55m (around December 21). Days are currently getting shorter — losing about 1 minute per day.
| Month | Day length | Sunrise | Sunset |
|---|---|---|---|
| January | 11h 3m | 07:17 | 18:20 |
| February | 11h 29m | 07:09 | 18:38 |
| March | 12h 0m | 06:48 | 18:49 |
| April | 12h 36m | 06:22 | 18:57 |
| May | 13h 5m | 06:04 | 19:08 |
| June | 13h 20m | 06:00 | 19:20 |
| July | 13h 14m | 06:08 | 19:22 |
| August | 12h 50m | 06:19 | 19:09 |
| September | 12h 16m | 06:27 | 18:43 |
| October | 11h 43m | 06:34 | 18:16 |
| November | 11h 12m | 06:48 | 18:00 |
| December | 10h 56m | 07:07 | 18:02 |