Six months of night is true in exactly one place. Everywhere else in Antarctica, the dark is shorter.
By Chinstrap Collective
It depends where you stand. Only the South Pole gets about six months of darkness: the sun sets around the March equinox and rises around the September equinox. At McMurdo Station the sun stays down for about 16 weeks, at Rothera for about two, and at the Antarctic Circle it still rises, briefly, every day.
How long is it dark at the South Pole?
About six months. The South Pole has just one sunrise and one sunset a year (NOAA). The sun sets around the March equinox, and it comes up again at the September equinox and stays up for about six months (NASA Earth Observatory). In 2026, by the US Naval Observatory’s tables, the sun is below the horizon at the Pole from 23 March to 19 September: 181 days (USNO).
How long is it dark in the rest of Antarctica?
The rule is simple: the closer to the Pole, the longer the night. Near the edge of the continent, the sun may skip only a week or two, or not at all. Here is 2026, place by place.
| Place | Latitude | Sun below the horizon all day (2026) | How long |
|---|---|---|---|
| South Pole | 90° S | 23 March to 19 September | About 6 months (181 days) |
| McMurdo Station | 77.8° S | 25 April to 18 August | About 16 weeks (116 days) |
| Rothera Research Station | 67.6° S | 14 June to 27 June | About 2 weeks (14 days) |
| Antarctic Circle | 66.6° S | None: on 21 June the sun is up for about 2 hours | 0 days |
Computed from the US Naval Observatory’s sun data for a flat horizon; mountains, ice and height shift the real dates by a few days.
Is it pitch black all winter?
Not at first. At the Pole, the sun goes down slowly, “through prolonged stages of twilight, after the sun dips below the horizon, in which the light gradually diminishes until darkness reigns”, as the South Pole’s IceCube team describes it (IceCube, 2023).
How much twilight is left at midwinter depends, again, on where you are. On 21 June 2026, Rothera has no sunrise but about five and a half hours of civil twilight around midday. McMurdo and the South Pole get none: the sun stays too far below the horizon all day (USNO).
Who stays for the dark?
Not many people. The US South Pole station holds up to 150 people in summer and 42 in winter, and McMurdo up to 200 in winter (National Science Foundation; NSF). At the British Antarctic Survey’s Rothera station, 160-plus people in summer become 34 in winter (British Antarctic Survey).
Midwinter’s Day: a breakfast worth the wait
In the long dark, the stations keep their own calendar. 21 June, Midwinter’s Day, is the shortest day of the year and the halfway point of winter (British Antarctic Survey). For the British Antarctic Survey’s winter teams, it brings a special breakfast and handmade gifts, because, in their words, “there are no shops in Antarctica!” (BAS)
Breakfast is not the only meal that matters, either. At Rothera, food is “served five times a day” (BAS). When the sun won’t mark the hours, meals do a good job of it.
How cold does Antarctica get at night?
Antarctica is the coldest, windiest and driest continent (Australian Antarctic Division). The lowest temperature ever measured on the ground is −89.2 °C (−128.6 °F), recorded at Vostok station on 21 July 1983, in the polar night (World Meteorological Organization). That was one month to the day after Midwinter’s Day.
Where do penguins go in the polar night?
Most of them leave. From March to early May, chinstrap penguins leave their colonies and move north of the pack ice for the winter (Australian Antarctic Division). There they forage day and night, with their diving effort concentrated near midnight and noon (AAD).
One penguin stays for the dark on purpose. Emperor penguins are the only animals that breed during the Antarctic winter, and only the males incubate the eggs (Australian Antarctic Division).
And the other half of the year?
Summer swings the other way: Rothera has about six weeks of 24-hour daylight (British Antarctic Survey), which makes “good night” a matter of opinion.
A Morning Waddle thought
Mornings, it turns out, don’t need a sunrise. They need a routine: a breakfast worth getting up for, and people to share it with. The rest of us have it easy; the sun comes up every day, and all we need is the first cup.
Antarctica polar night FAQ
Is Antarctica dark for six months?
Only at the South Pole, where the sun is down from about the March equinox to the September equinox (NOAA; USNO). Elsewhere the night is shorter.
How many months is it dark in Antarctica?
From none at the Antarctic Circle to about four months at McMurdo and six at the Pole (USNO, 2026).
Is there night in Antarctica in summer?
Not much: in summer the sun stays up around the clock for about six weeks at Rothera (BAS) and about six months at the Pole (NASA).
Do penguins stay in Antarctica in winter?
Chinstraps don’t: they winter at sea north of the pack ice. Emperor penguins stay and breed through it (AAD; AAD).
More Field Notes: Chinstrap penguin facts: a day in the life · How do penguins sleep? 10,000 naps a day
Sources
- US Naval Observatory, Sun and Moon data for one day, read 8 Oct 2026 for 2026 at the South Pole, McMurdo, Rothera and 66.6° S: the days without sunrise, and civil twilight on 21 June.
- NOAA (2024), Sunset at South Pole signals 6 months of darkness: one sunrise and one sunset a year.
- NASA Earth Observatory, Spring sunrise over the South Pole: sunrise at the September equinox, about six months of sun.
- IceCube Neutrino Observatory (2023), Week 13 at the Pole: the prolonged twilight after sunset.
- National Science Foundation, South Pole station and McMurdo station: numbers of people.
- British Antarctic Survey, Rothera Research Station: numbers of people.
- British Antarctic Survey (2025), Happy Midwinter’s Day: the shortest day; the special breakfast and handmade gifts.
- British Antarctic Survey (2021), Life in Antarctica: five meals a day; six weeks of 24-hour daylight at Rothera.
- Australian Antarctic Division, Weather: the coldest, windiest and driest continent.
- World Meteorological Organization, record low temperature at Vostok.
- Australian Antarctic Division, Chinstrap penguin: winter north of the pack ice; diving near midnight and noon.
- Australian Antarctic Division, Emperor penguin: the only animals that breed in the Antarctic winter; males incubate.