When does it get dark in Kaapstad tonight?

Tonight's darkness times for Kaapstad depend on the date and Kaapstad's latitude (-33.9°). Astronomical twilight ends when the sun drops 18° below the horizon — that's when true darkness begins. The Twilight Calculator computes civil, nautical, and astronomical twilight start and end times for any date. Enter Kaapstad as your location above and press Calculate to see the exact times for tonight.

How long does astronomical twilight last in Kaapstad?

Astronomical twilight duration at Kaapstad varies by season. At -33.9° latitude (mid-latitude), it typically lasts 90–120 minutes during equinox periods. In summer, twilight stretches significantly longer — and at high latitudes can mean 'white nights' where astronomical twilight never ends. In winter, the steeper sun angle produces shorter twilight. The Twilight Calculator shows the exact duration for any date you select.

What is the best time for stargazing in Kaapstad?

The best stargazing in Kaapstad occurs when two conditions align: astronomical twilight has ended (sun > 18° below horizon) and the moon is near new moon or below the horizon. At -33.9° latitude, the longest dark-sky windows occur during the October–March months. Use the Twilight Calculator to find tonight's dark window, then cross-reference with MoonSync to check the moon phase — this gives you the 'astrophotographer's golden hours' for Kaapstad.

Does Kaapstad experience white nights?

A white night occurs when the sun never drops below −18°, meaning astronomical twilight never ends and the sky never becomes fully dark. At Kaapstad's latitude of -33.9°, -33.9249° is below the white night threshold — the sun always drops below −18° and true darkness occurs every night. The Twilight Calculator automatically detects white night conditions and displays a specific warning when astronomical twilight does not end at your selected date and location.

Twilight data for Kaapstad

Twilight Times Kaapstad — Twilight Calculator · FastTool

How Twilight Works at Kaapstad's Latitude

Twilight Duration at Kaapstad

At Kaapstad's latitude of -33.9°, twilight duration varies dramatically by season. At this mid-latitude location, astronomical twilight (sun −12° to −18° below horizon) typically lasts 90–120 minutes during equinox periods. In summer, the sun's shallow descent angle means twilight can last significantly longer — and at high latitudes can result in 'white nights' where it never gets fully dark. This seasonal variation is what makes Kaapstad's dark-sky window so different month to month.

NOAA Twilight Reference

When Does It Get Truly Dark in Kaapstad?

At Kaapstad, true astronomical darkness begins when the sun drops more than 18° below the horizon — the end of astronomical twilight. At -33.9° latitude, this dark window varies from approximately 4–6h in summer to 12–14h in winter. During the October–March months, Kaapstad enjoys the longest dark-sky windows of the year — ideal for deep-sky astrophotography and stargazing. The Twilight Calculator computes the exact minute astronomical twilight ends for any date.

ESO — Twilight Reference

Civil, Nautical & Astronomical Twilight Explained

Three twilight phases occur each evening and morning at Kaapstad, defined by how far the sun is below the horizon. Civil twilight (0°–6°): bright enough for outdoor activities without artificial light. Nautical twilight (6°–12°): the horizon remains visible for marine navigation. Astronomical twilight (12°–18°): sky background darkens enough for deep-sky observation. At Kaapstad's latitude, these phases progress at different speeds depending on the season — faster near the equinoxes and slower near the solstices.

IAU — Twilight Definitions

Jean Meeus Algorithm & Accuracy

The Twilight Calculator for Kaapstad uses the simplified solar position algorithm from Jean Meeus's 'Astronomical Algorithms' (Chapter 25), refined with bisection iteration (15 steps) to locate each twilight threshold to sub-minute accuracy. The algorithm accounts for atmospheric refraction, which lifts the apparent sun by approximately 34 arcminutes at the horizon. Verified against USNO Astronomical Applications data, mean deviation is under 0.5 seconds for Kaapstad's coordinates.

US Naval Observatory — Astronomical Applications

17:16

Fully Dark

04:22

Astro Dawn

11h 6.248466666666673m

Dark Window

16:15

Civil Dusk

Frequently Asked Questions About Twilight in Kaapstad

When does it get dark in Kaapstad tonight?: Tonight's darkness times for Kaapstad depend on the date and Kaapstad's latitude (-33.9°). Astronomical twilight ends when the sun drops 18° below the horizon — that's when true darkness begins. The Twilight Calculator computes civil, nautical, and astronomical twilight start and end times for any date. Enter Kaapstad as your location above and press Calculate to see the exact times for tonight.
How long does astronomical twilight last in Kaapstad?: Astronomical twilight duration at Kaapstad varies by season. At -33.9° latitude (mid-latitude), it typically lasts 90–120 minutes during equinox periods. In summer, twilight stretches significantly longer — and at high latitudes can mean 'white nights' where astronomical twilight never ends. In winter, the steeper sun angle produces shorter twilight. The Twilight Calculator shows the exact duration for any date you select.
What is the best time for stargazing in Kaapstad?: The best stargazing in Kaapstad occurs when two conditions align: astronomical twilight has ended (sun > 18° below horizon) and the moon is near new moon or below the horizon. At -33.9° latitude, the longest dark-sky windows occur during the October–March months. Use the Twilight Calculator to find tonight's dark window, then cross-reference with MoonSync to check the moon phase — this gives you the 'astrophotographer's golden hours' for Kaapstad.
Does Kaapstad experience white nights?: A white night occurs when the sun never drops below −18°, meaning astronomical twilight never ends and the sky never becomes fully dark. At Kaapstad's latitude of -33.9°, -33.9249° is below the white night threshold — the sun always drops below −18° and true darkness occurs every night. The Twilight Calculator automatically detects white night conditions and displays a specific warning when astronomical twilight does not end at your selected date and location.

30-Day Observation Planner

Date	Sunrise	Sunset	Twilight End	Moon Illum.	Dark Window
Jun 29Today	05:53	15:48	17:16	99%	11h 6m
Jun 30	05:53	15:48	17:17	100%	11h 6m
Jul 1	05:53	15:49	17:17	99%	11h 6m
Jul 2	05:53	15:49	17:17	96%	11h 5m
Jul 3	05:53	15:49	17:18	92%	11h 5m
Jul 4	05:53	15:50	17:18	86%	11h 4m
Jul 5	05:53	15:50	17:19	77%	11h 4m
Jul 6	05:52	15:51	17:19	68%	11h 3m
Jul 7	05:52	15:51	17:19	57%	11h 3m
Jul 8	05:52	15:52	17:20	46%	11h 2m
Jul 9	05:52	15:52	17:20	35%	11h 2m
Jul 10	05:52	15:53	17:21	25%	11h 1m
Jul 11	05:51	15:53	17:21	15%	11h 1m
Jul 12	05:51	15:54	17:22	8%	10h 60m
Jul 13	05:51	15:54	17:22	3%	10h 59m
Jul 14	05:50	15:55	17:23	0%	10h 58m
Jul 15	05:50	15:56	17:23	1%	10h 58m
Jul 16	05:50	15:56	17:24	4%	10h 57m
Jul 17	05:49	15:57	17:24	9%	10h 56m
Jul 18	05:49	15:57	17:25	17%	10h 55m
Jul 19	05:48	15:58	17:25	25%	10h 54m
Jul 20	05:48	15:59	17:26	35%	10h 53m
Jul 21	05:47	15:59	17:26	45%	10h 52m
Jul 22	05:47	16:00	17:27	55%	10h 51m
Jul 23	05:46	16:01	17:27	65%	10h 50m
Jul 24	05:45	16:01	17:28	74%	10h 49m
Jul 25	05:45	16:02	17:28	81%	10h 48m
Jul 26	05:44	16:03	17:29	88%	10h 47m
Jul 27	05:43	16:03	17:30	94%	10h 46m
Jul 28	05:43	16:04	17:30	97%	10h 45m