Book your cruise. Cruise lines sail to Antarctica from the middle of November until March, which is the summer season in Antarctica. Temperatures vary between 40 degrees above Fahrenheit to below zero at any time during Antarctic cruises.
Call your cruise line to see if there are formal nights, and consider the length of your cruise.
Pack warmly. Heavy winter parkas, gloves, hats, thermal undergarments, waterproof pants, rubber boots and pants and sweaters are necessary.
Include a waterproof bag for your camera when traveling on the Zodiac -- a small boat that takes passengers from the ship to the shore -- so your camera doesn't get wet.
Bring sea-sickness medicine. Cruising to Antarctica includes passing through the Drake Passage, which is 36 hours of rough seas and strong winds.