Depending on the species, penguin eggs take anywhere from 1 month to 65 days to hatch. Emperor penguin eggs take 62 to 65 days to reach the hatching stage, according to SeaWorld.
Penguin eggs are different shapes and sizes, depending on the species. Some eggs are white, while others are blue or green. Emperor penguin eggs are elliptical in shape so that they can be incubated on the tops of their parent's feet. This unique shape allows the eggs to roll in a circle if they should happen to fall off of the mother or father penguin's feet. A brood patch located on the bottom of the penguin's abdomen allows the egg to stay warm during cold weather.