The Southern Hemisphere is the half sphere of Earth which is south of the equator. It contains all or parts of five continents (Antarctica, Australia, about 90% of South America, the southern third of Africa, and several southern islands off the continental mainland of Asia), four oceans (Indian, South Atlantic, Southern, and South Pacific) and most of the Pacific Islands in Oceania. Due to the tilt of Earth's rotation relative to the Sun and the ecliptic plane, summer is from December to March and winter is from June to September. September 22 or 23 is the vernal equinox and March 20 or 21 is the autumnal equinox.

Continents and microcontinents

Africa (approximately one third, from south of Libreville in Gabon in the west to south of Somalia in the east)
Antarctica
Asia (the very southern island portion including East Timor, most of Indonesia and a few islets of the Maldives)
Australia (the entire mainland is in the Southern Hemisphere)
South America (mostly, south of the Amazon River mouth in the east and Quito in the west)
Zealandia (New Caledonia, the New Zealand landmass and associated islands are wholly within the Southern Hemisphere)

Countries and territories

African countries (Entirely): 
Angola 
Botswana 
Burundi 
Comoros 
Lesotho 
Madagascar 
Malawi 
Mauritius 
Mozambique 
Namibia 
Rwanda 
Seychelles 
South Africa 
Swaziland 
Tanzania 
Zambia 
Zimbabwe 

African Countries (Mostly): 
Democratic Republic of the Congo 
Gabon 
Republic of the Congo 

African Countries (Partly): 
Equatorial Guinea 
Kenya 
Somalia 
São Tomé and Príncipe 
Uganda 


Asian countries (Entirely): 
East Timor 

Asian Countries (Mostly): 
Indonesia 

Asian Countries (Partly): 
Maldives 


Oceania Countries (Entirely): 
Australia 
Fiji 
Nauru 
New Zealand 
Papua New Guinea 
Samoa 
Solomon Islands 
Tonga 
Tuvalu 
Vanuatu 
Oceania Countries (Mostly): 
Kiribati 


South American Countries (Entirely): 
Argentina 
Bolivia 
Chile 
Paraguay 
Peru 
Uruguay 

South American Countries (Mostly): 
Brazil 
Ecuador 

South American Countries (Partly): 
Colombia 


Other territories 
American Samoa (USA) 
Antarctic and sub-Antarctic islands 
Bouvet Island (Norway) 
Chagos Archipelago (United Kingdom) 
Cook Islands (New Zealand) 
Easter Island (Chile) 
Falkland Islands (United Kingdom, claimed by Argentina) 
French Polynesia (including Tahiti) (France) 
Galápagos Islands (Ecuador) 
Jarvis Island (USA) 
Juan Fernández Islands (Chile) 
Kerguelen Islands (France) 
Kermadec Islands (New Zealand) 
Mayotte (France) 
Territory of New Caledonia and Dependencies (France) 
New Zealand Sub-Antarctic Islands (New Zealand) 
Niue (New Zealand) 
Pitcairn, Henderson, Ducie and Oeno Islands (United Kingdom) 
Réunion (France) 
Saint Helena (United Kingdom) 
Saint Paul Island and Amsterdam Island (France) 
South Georgia and the South Sandwich Islands (United Kingdom, claimed by Argentina) 
South Orkney Islands (Antarctic Treaty signatories) 
Swains Island (USA, claimed by Tokelau) 
Tokelau (New Zealand) 
Tristan da Cunha (United Kingdom) 
Territory of Wallis and Futuna Islands (France)