Yes, they are. The word ‘precocial’ refers to young animals that are mature and able to move around immediately after birth. They are also likely to leave the nest or egg after birth or hatching.
Sea turtles lay eggs on beaches and once the eggs hatch, the baby turtles struggle out to the surface and move towards the water.
Common turtle pets like the red-eared terrapin are also precocial. They are able to break open their own egg with a special egg tooth and are able to leave the eggshell immediately if necessary.