Southern Ocean Facts for Kids

10 fun facts about the Southern Ocean by Kids World Travel Guide

Top Ten Facts about the Southern Ocean

Here are our Top Ten Southern Ocean Facts for Kids with lots of useful info for school projects or to get inspired for your next travels. Read here what you definitely should know about the Southern Ocean.

1. Location: Where is the Southern Ocean? The Southern Ocean is located in the southern hemisphere, south of 60 degrees South latitude. It surrounds Antarctica.

The Southern Ocean is thus emerging from the waters of the South Atlantic Ocean, the South Pacific Ocean and the Indian Ocean in latitudes south of 60 degrees South.

Below you can see a map showing Antarctica and the Southern Ocean surrounding it:

Southern Ocean Map

2. Name: The Southern Ocean is also referred to as the Antarctic Ocean, South Polar Ocean or Austral Ocean. The Southern Ocean surrounds the landmass of Antarctica and is the closest ocean to the South Pole.

How old is the Southern Ocean? The Southern Ocean is the youngest ocean as it was formed about 34 million years ago when South America and Antarctica moved apart.

3. Size: How big is the Southern Ocean? The Southern Ocean is the fourth biggest (or second smallest) ocean on earth and covers only about 6% of the earth’s surface and 10 -15% of the ocean waters of our planet.

4. Depth: How deep is the Southern Ocean? The Southern is between 4,000m and 4,800m/12,000ft and 14,000ft deep with some deep trenches. The average depth is about 3,200m/10,700ft. The deepest point in the Southern Ocean is in the South Sandwich Trench with a depth of over 7,000m 23,000ft!

Iceberg in the Southern Ocean

5. Southern Ocean Facts: Icebergs will be encountered in the Southern Ocean during any season, but during May to October there are also strong winds which make crossing the ocean even more dangerous.

Big iceberg fragments (huge junks of ice) drift in the water. They can big several hundred metres high! Ice fragments are considered small if they are not thicker than 1 m/ 3 ft. Even in summer ice-breaker ships often need to escort ships on their passage through the Antarctic waters.

Icy waters of the Southern Ocean

Antarctic sea ice is seasonal which means the ice sheets on parts of the Southern Ocean melt in summer and freeze in winter. Some of the ice sheets on the ocean are only some meters thick and thus melt during the warmer summers. In winter, however, the Antarctic sea ice covers an area that is about as large as twice the size of the land area of the USA!

Climate change has a huge impact on the sea ice and the Bellinghausen Sea was ice free for the first time since satellite records were taken. Record lows were noted in many parts of the the Antarctic Sea in the recent years.

More Southern Ocean Facts

6. Temperature: The sea temperatures of the Southern Ocean range from -2 deg Celsius to 10 degrees Celsius/ 28 Fahrenheit - 50 Fahrenheit.

The climatic conditions depend also on the seasons. Winter is long and lasts from April to October. Then the water temperature will in general be below 0 degrees Celsius/ 32 Fahrenheit.

The water in the Southern Pacific Ocean freezes in winter below 65 degrees South latitude while in the Southern Atlantic Ocean, the water freezes already below 55 degrees South latitude! The Antarctic coastline has, however, also some few ice-free areas, even in winter.

Exploring Antarctic waters - shutterstock.com

Exploring Antarctica

The low temperatures in the region, however, do not deter tourists exploring the area on special adventure travels and expeditions. More than 50,000 tourists experience the Southern Ocean every year.

7. A bit of history on the Antactic Ocean and Antarctica: The first known explorers who came in contact with the cold waters of the Southern Ocean were Bartolomeo Diaz who circumnavigated the Cape of Good Hope in South Africa in 1487 and Ferdinand Magellan who explored the Tierra del Fuego in South America in 1520. Captain James Cook searched for land in the Southern Ocean but never sighted Antarctica, he landed in Botany Bay/Australia in 1770 instead. He, however, crossed the Antarctic circle and reached as far as 71 degrees South latitude in 1773.

In 1819, for the first time land was sighted south of 60 degrees South latitude. Only in the 19th century Antarctica was discovered and explored during various expeditions. Sir Ernest Shakelton's expedition was the first attempt to cross Antarctica on land, but they only managed to reach 88 degrees South latitude. Roald Amundsen was the first to reach the South Pole in 1911.

8. Southern Ocean Facts: Animals in the Southern Ocean. The species-rich waters of the Southern Ocean are important for the ecosystem of our planet.

The Southern Ocean is home to the emperor penguins and wandering albatrosses, blue whales and fur seals. Some seal species hunt underwater and breed on land or on ice. The biggest of the seals are the elephant seals which weigh up to 4,000 kg/ 8,818 lb.

Every spring over 100 million birds nest on the rocky shores of Antarctica.

There are also several species of invertebrates living in the Southern Ocean, but only few species of fish. The largest invertebrate found on our planet is the giant squid, which lives in the Southern Ocean. It grows up to 15 m/ 49 ft in length!

Emperor Penguins with penguin chicks in the Southern Ocean - image by Shutterstock

Emperor Penguins with their chicks

Antarctic krill are an important species in the Southern Ocean waters. They are the main food source for many animals species such as whales and penguins that roam the Antarctic waters. The huge swarms of krill that are in the algae rich waters in summer can be even seen as pink patches from space!

9. Ports: There are only a few ports in the Southern Ocean. The ports belong mainly to research stations, such as the Rothera Station (British research base), Palmer Station (USA), Mawson Station (Australia), but the southernmost ports in Australia are recognised also as ports of the Southern Ocean. Among them are Adelaide port in South Australia and Macquarie Port on Tasmania. The southernmost port in the Southern Ocean is McMurdo Station, which is an American research base, built on Antarctic land claimed by New Zealand. Access to the ports is limited only to summertime and even then ice-breakers often need to escort visiting ships.

10. Southern Ocean Facts: Do people live permanently on Antarctica? There are no indigenous people on Antarctica. On the coldest continent there are only research stations from various countries, but these researchers, scientists and explorers and their families work and live there only for a limited time.

Researchers working on Antarctica

There are only two settlements on Antarctica, where there are people living and working all year round. These settlements are small, with less than 100 people in winter. They are the Chilean research station 'Villas Las Estrellas' and the Argentinian research station 'Esperanza Base'.

The temperatures there are very cold, between zero degrees Celsius and minus ten degrees Celsius. However, climate change is noticeable also there, as in March 2015, the highest temperature recorded was 17 Celsius/ 62F!

Southern Ocean Facts: Did you know that several big yacht races are held also in the Southern Ocean, among the most well-known are the Volvo Ocean Race and the Global Challenge?

Southern Ocean Facts
Great Resources

Antarctic and Southern Coalition. "Welcome to the Southern Ocean." ASOC. Last accessed 28 May 2025

Ocean Race. "The Ocean Race 2027". OceanRace. Last accessed 28 May 2025
Lindblat Expeditions. "Exploring Antarctic." NatGeo. Last accessed 28 May 2025 (short youtube video)

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Picture Credits for Southern Ocean Facts Page: Shutterstock.com

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