The magazine shared the news via Twitter on Friday night, writing, "POLAR BARE: @KateUpton in Antarctica is your 2013 SI Swimsuit Cover Model!"
Upton, 20, is slightly more covered up, posing in her Antarctica white jacket, unzipped, with a fur hood and bikini bottom.
The issue, which goes on sale Tuesday, also promises photos of models from all seven continents.
Talk about your sexy snow bunnies! For the second year in a row, supermodel Kate Upton graces the Sports Illustrated cover of their coveted Swimsuit Issue.