Question 1

How many hours of daylight does Surabaya get today?

Accepted Answer

Surabaya currently gets approximately 12 hours and 1 minutes of daylight today. This varies throughout the year — days are longest around the summer solstice (June in the Northern Hemisphere, December in the Southern Hemisphere) and shortest around the winter solstice. Because Surabaya is near the equator, day length stays relatively consistent, typically between 11 and 13 hours. Our calculations use the SunCalc astronomical library for accuracy within 1–2 minutes.

Question 2

What time does the sun rise in Surabaya?

Accepted Answer

Sunrise times in Surabaya change throughout the year based on the Earth's axial tilt and the city's position at 7.3° latitude. Use the table above to see today's exact sunrise time, as well as dawn (civil twilight) and other twilight phases. The earliest sunrise typically occurs around the summer solstice, while the latest sunrise happens near the winter solstice. Near the equator, sunrise times vary by less than an hour across the year. All sunrise calculations are based on NOAA solar position algorithms via the SunCalc library.

Question 3

What time does the sun set in Surabaya?

Accepted Answer

Sunset times in Surabaya vary by season due to the Earth's orbital mechanics and the city's latitude of 7.3°. Check the table above for today's exact sunset time, including dusk and twilight phases. The latest sunset typically occurs a few days after the summer solstice, while the earliest sunset happens a few days before the winter solstice. Near the equator, sunset times remain fairly consistent throughout the year, typically varying by less than an hour.

Question 4

How does day length change throughout the year in Surabaya?

Accepted Answer

Surabaya is located near the equator at 7.3° latitude, so day length varies relatively little throughout the year — typically between about 11 and 13 hours. The sun rises and sets at roughly the same time year-round, and twilight transitions are short and abrupt compared to higher latitudes. This consistency makes Surabaya one of the more predictable locations for planning outdoor activities. The slight variation that does occur peaks around the equinoxes in March and September.

Question 5

What is civil twilight in Surabaya?

Accepted Answer

Civil twilight in Surabaya is the period when the sun is between 0° and 6° below the horizon. During civil twilight, there is enough natural light for most outdoor activities without artificial lighting. It occurs just before sunrise (dawn) and just after sunset (dusk). Near the equator, civil twilight is relatively short, typically lasting only 20–25 minutes. The exact duration for Surabaya is shown in the twilight data table above.

Question 6

What are the different twilight phases?

Accepted Answer

There are three twilight phases, each defined by the sun's angle below the horizon. Civil twilight (0°–6°) is the brightest phase, with enough light for outdoor activities without artificial lighting. Nautical twilight (6°–12°) is dimmer but still allows sailors to see the horizon for celestial navigation. Astronomical twilight (12°–18°) is nearly dark, with only the faintest glow on the horizon, and most stars become visible. Below 18° is considered full astronomical night. The duration of each phase varies by latitude and season — our data table above shows all twilight phases for Surabaya.

Question 7

When is the longest day in Surabaya?

Accepted Answer

The longest day in Surabaya occurs around the summer solstice. For Surabaya in the Southern Hemisphere, the longest day is around December 21–22. On this date, Surabaya experiences its earliest sunrise and near-latest sunset of the year. Near the equator, the longest day is only slightly longer than the shortest, differing by about 1–2 hours. The shortest day (winter solstice) occurs approximately six months later.

Question 8

Does daylight saving time affect sunrise and sunset times in Surabaya?

Accepted Answer

Surabaya does not observe daylight saving time, so sunrise and sunset times change only due to natural seasonal variation throughout the year. The gradual shift in sunrise and sunset times follows a smooth curve driven by the Earth's axial tilt and orbital position. This makes it easier to predict sunrise and sunset patterns in Surabaya compared to cities that observe DST, where clock changes create abrupt jumps in the schedule.

Astronomical Dawn	4:23:16 AM
Nautical Dawn	4:47:31 AM
Civil Dawn	5:11:47 AM
Sunrise	5:32:42 AM
Golden Hour End	6:00:24 AM
Solar Noon	11:33:15 AM
Golden Hour Start	5:06:07 PM
Sunset	5:33:49 PM
Civil Dusk	5:54:44 PM
Nautical Dusk	6:19:00 PM
Astronomical Dusk	6:43:15 PM
Day Length	12h 1m

Moonrise	7:05:21 PM
Moonset	7:06:15 AM
Moon Phase	🌖 Waning Gibbous
Illumination	95%

Date	Sunrise	Sunset	Day Length	Moonrise	Moonset	Phase
Apr 1, Wed	5:33 AM	5:35 PM	12h 2m	5:05 PM	5:34 AM	🌕
Apr 2, Thu	5:32 AM	5:34 PM	12h 2m	5:45 PM	6:19 AM	🌕
Apr 3, Fri	5:32 AM	5:34 PM	12h 2m	6:24 PM	—	🌕
Apr 4, Sat	5:32 AM	5:33 PM	12h 1m	7:05 PM	7:06 AM	🌖
Apr 5, Sun	5:32 AM	5:33 PM	12h 1m	7:49 PM	7:54 AM	🌖
Apr 6, Mon	5:32 AM	5:32 PM	12h 0m	8:36 PM	8:43 AM	🌖
Apr 7, Tue	5:32 AM	5:32 PM	12h 0m	9:25 PM	9:33 AM	🌖
Apr 8, Wed	5:32 AM	5:31 PM	12h 0m	10:16 PM	10:24 AM	🌗
Apr 9, Thu	5:32 AM	5:31 PM	11h 59m	11:08 PM	11:15 AM	🌗
Apr 10, Fri	5:32 AM	5:30 PM	11h 59m	11:59 PM	12:05 PM	🌗
Apr 11, Sat	5:32 AM	5:30 PM	11h 58m	12:51 AM	12:52 PM	🌗
Apr 12, Sun	5:31 AM	5:30 PM	11h 58m	1:41 AM	1:36 PM	🌘
Apr 13, Mon	5:31 AM	5:29 PM	11h 58m	2:29 AM	2:19 PM	🌘
Apr 14, Tue	5:31 AM	5:29 PM	11h 57m	3:18 AM	3:01 PM	🌘
Apr 15, Wed	5:31 AM	5:28 PM	11h 57m	4:07 AM	3:43 PM	🌘
Apr 16, Thu	5:31 AM	5:28 PM	11h 57m	4:58 AM	4:26 PM	🌑
Apr 17, Fri	5:31 AM	5:27 PM	11h 56m	5:53 AM	5:12 PM	🌑
Apr 18, Sat	5:31 AM	5:27 PM	11h 56m	6:52 AM	6:03 PM	🌑
Apr 19, Sun	5:31 AM	5:27 PM	11h 55m	—	6:58 PM	🌒
Apr 20, Mon	5:31 AM	5:26 PM	11h 55m	7:54 AM	7:57 PM	🌒
Apr 21, Tue	5:31 AM	5:26 PM	11h 55m	8:58 AM	9:01 PM	🌒
Apr 22, Wed	5:31 AM	5:25 PM	11h 54m	10:03 AM	10:06 PM	🌒
Apr 23, Thu	5:31 AM	5:25 PM	11h 54m	11:05 AM	11:09 PM	🌓
Apr 24, Fri	5:31 AM	5:25 PM	11h 54m	12:01 PM	12:08 AM	🌓
Apr 25, Sat	5:31 AM	5:24 PM	11h 53m	12:53 PM	1:03 AM	🌓
Apr 26, Sun	5:31 AM	5:24 PM	11h 53m	1:39 PM	1:54 AM	🌔
Apr 27, Mon	5:31 AM	5:24 PM	11h 53m	2:21 PM	2:42 AM	🌔
Apr 28, Tue	5:31 AM	5:23 PM	11h 52m	3:01 PM	3:28 AM	🌔
Apr 29, Wed	5:31 AM	5:23 PM	11h 52m	3:42 PM	4:14 AM	🌔
Apr 30, Thu	5:31 AM	5:23 PM	11h 52m	4:21 PM	5:01 AM	🌕

Sunrise & Sunset in Surabaya, Indonesia

Sun Times

Moon

Monthly Summary — April 2026

Twilight Phases in Surabaya

Holidays in Indonesia

Explore Surabaya

Frequently Asked Questions about Sunrise & Sunset in Surabaya

Sunrise & Sunset in Other Cities