Antarctic circles of latitude

The following are circles of latitude between the 60th parallel south and the South Pole. Although the 55th parallel south, crossing the southernmost point of Chile, is the last line of latitude moving southward to touch any part of any continent other than Antarctica, the 60th parallel south defines the northern limit of the Antarctic Treaty System and thus the political boundary of Antarctica.

60th parallel south to 65th parallel south

61st parallel south

The 61st parallel south is a circle of latitude that is 61 degrees south of the Earth's equatorial plane. No land lies on the parallel—it crosses nothing but the Southern Ocean.

At this latitude the sun is visible for 19 hours, 16 minutes during the December solstice and 5 hours, 32 minutes during the June solstice. On the December solstice, the sun's altitude is 52.44 degrees and on the June solstice, it is 5.56 degrees.

The lowest latitude where civil twilight can last all night lies approximately on this parallel.

Starting at the Prime Meridian and heading eastwards, the parallel 61° south passes through:

{| class="wikitable plainrowheaders" ! scope="col" width="125" | Coordinates ! scope="col" | Ocean ! scope="col" | Notes |- | style="background:#b0e0e6;" | ! scope="row" style="background:#b0e0e6;" rowspan="4" | Southern Ocean | style="background:#b0e0e6;" | South of the Atlantic Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Indian Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Pacific OceanPassing through the Drake Passage between South America and the Antarctic Peninsula |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Atlantic OceanPassing just north of Elephant Island, and Clarence Island (claimed by , and )Passing just south of the South Orkney Islands, (claimed by )

62nd parallel south

The 62nd parallel south is a circle of latitude that is 62 degrees south of the Earth's equatorial plane. It crosses the Southern Ocean and Antarctica.

At this latitude the sun is visible for 19 hours, 45 minutes during the December solstice and 5 hours, 9 minutes during the June solstice.

Starting at the Prime Meridian and heading eastwards, the parallel 62° south passes through:

{| class="wikitable plainrowheaders" ! scope="col" width="125" | Coordinates ! scope="col" | Continent or ocean ! scope="col" | Notes |- | style="background:#b0e0e6;" | ! scope="row" style="background:#b0e0e6;" rowspan="4" | Southern Ocean | style="background:#b0e0e6;" | South of the Atlantic Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Indian Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Pacific OceanPassing through the Drake Passage between South America and the Antarctic Peninsula |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Atlantic Ocean

63rd parallel south

The 63rd parallel south is a circle of latitude that is 63 degrees south of the Earth's equatorial plane. It crosses the Southern Ocean and Antarctica.

At this latitude the sun is visible for 20 hours, 19 minutes during the December solstice and 4 hours, 42 minutes during the June solstice. If the latitude in the southern hemisphere is 63°26' or smaller, it is possible to view both astronomical dawn and dusk every day of the month of March.

Starting at the Prime Meridian and heading eastwards, the parallel 63° south passes through:

{| class="wikitable plainrowheaders" ! scope="col" width="125" | Coordinates ! scope="col" | Continent or ocean ! scope="col" | Notes |- | style="background:#b0e0e6;" | ! scope="row" style="background:#b0e0e6;" rowspan="4" | Southern Ocean | style="background:#b0e0e6;" | South of the Atlantic Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Indian Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Pacific Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Atlantic Ocean

64th parallel south

The 64th parallel south is a circle of latitude that is 64 degrees south of the Earth's equatorial plane. It crosses the Southern Ocean and the Antarctic mainland, the latter as the most northern latitude.

At this latitude the sun is visible for 21 hours, 1 minute during the December solstice and 4 hours, 12 minutes during the June solstice.

Starting at the Prime Meridian and heading eastwards, the parallel 64° south passes through:

{| class="wikitable plainrowheaders" ! scope="col" width="125" | Coordinates ! scope="col" | Continent or ocean ! scope="col" | Notes |- | style="background:#b0e0e6;" | ! scope="row" style="background:#b0e0e6;" rowspan="4" | Southern Ocean | style="background:#b0e0e6;" | South of the Atlantic Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Indian Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Pacific Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Atlantic OceanPassing just north of Brabant Island, Antarctica

65th parallel south

The 65th parallel south is a circle of latitude that is 65 degrees south of the Earth's equatorial plane. It crosses the Southern Ocean and Antarctica.

At this latitude the sun is visible for 22 hours, 2 minutes during the December solstice and 3 hours, 35 minutes during the June solstice.

Starting at the Prime Meridian and heading eastwards, the parallel 65° south passes through:

{| class="wikitable plainrowheaders" ! scope="col" width="125" | Coordinates ! scope="col" | Continent or ocean ! scope="col" | Notes |- | style="background:#b0e0e6;" | ! scope="row" style="background:#b0e0e6;" rowspan="4" | Southern Ocean | style="background:#b0e0e6;" | South of the Atlantic Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Indian Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Pacific Ocean |- | style="background:#b0e0e6;" | | style="background:#b0e0e6;" | South of the Atlantic Ocean

65th parallel south to 70th parallel south

66th parallel south

The 66th parallel south is a circle of latitude that is 66 degrees south of the Earth's equatorial plane, about 61 km north of the Antarctic Circle. It crosses the Southern Ocean and Antarctica.

This latitude also roughly corresponds to the minimum latitude in which midnight sun can last all night near the summer solstice.

At this latitude the sun rises on December 13 and does not set again until December 30.

Starting at the Prime Meridian and heading eastwards, the parallel 66° south passes through:

67th parallel south

The 67th parallel south is a circle of latitude that is 67 degrees south of the Earth's equatorial plane, about 50 km south of the Antarctic Circle. It crosses the Southern Ocean and Antarctica.

At this latitude the sun is visible for 24 hours during the December solstice (Summer solstice) and 1 hour, 29 minutes during the June solstice (Winter solstice). If the latitude in the southern hemisphere is 67°45′ or smaller, every day of the month of September can view both astronomical dawn and astronomical dusk.

Starting at the Prime Meridian and heading eastwards, the parallel 67° south passes through:

! scope="row" | Antarctica | Enderby Land, claimed by |-

Antarctic circles of latitude

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