It is best to go in January and December if you are into wildlife adventures. Eat hearty as food during this time keep coming. Whales are searching the coastline for krill at this time. This is one way whale watchers and other animal lovers can observe such creatures. The peak season for penguins to hatch is also around this period. You will probably encounter several seals stretched out on shores and surrounding ice. Visit the page on Antarctica Cruise to get more information.
Wildlife babies of spring are best seen during Antarctica tours in March or February. This is when penguin chicks start growing and like to play a lot. The many baby penguins available for eating cause the seal population to multiply. Anytime within this period is a good time to catch orcas. Sunlight is on its last weeks so animals are eager to get the most out of it. If you cruise to the Antarctic Circle at this time you will see so very rarely visited landscape. The view of the sun setting is quite impressive around this time.