Daylight hours in Surabaya today
September 4, 2026 · Surabaya, Indonesia
2,374,658 people
Surabaya has 11h 59m of daylight today. Sunrise is at 05:30 and sunset is at 17:29. All times are calculated astronomically for Surabaya's exact coordinates.
Surabaya lies at 7°S. In Surabaya, day length ranges from 11h 42m in winter to 12h 33m in summer — a swing of about 0h 51m.
Solar noon — the moment the sun is highest — falls at 11:29 in Surabaya, 30 minutes before the clock says 12. The gap comes from the city's longitude within its timezone, the equation of time, and summer time where it applies. At midday the sun currently stands 75.4° above the horizon in Surabaya. Surabaya lies inside the tropics, so twice a year the midday sun passes straight overhead; at the opposite solstice it still reaches 59.3°.
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 Surabaya.
The longest day in Surabaya is around 12h 33m (around December 21). The shortest is around 11h 42m (around June 21).
Daylight hours in Surabaya by month
| Month | Day length | Sunrise | Sunset |
|---|---|---|---|
| January | 12h 30m | 05:24 | 17:54 |
| February | 12h 20m | 05:34 | 17:54 |
| March | 12h 9m | 05:34 | 17:43 |
| April | 11h 57m | 05:31 | 17:28 |
| May | 11h 47m | 05:33 | 17:20 |
| June | 11h 42m | 05:39 | 17:21 |
| July | 11h 44m | 05:43 | 17:28 |
| August | 11h 52m | 05:38 | 17:31 |
| September | 12h 3m | 05:24 | 17:27 |
| October | 12h 15m | 05:08 | 17:23 |
| November | 12h 26m | 05:01 | 17:28 |
| December | 12h 32m | 05:09 | 17:41 |