What kinda turtle is it. It varies from specie to specie. An example of specie to spe ie variation is in leopard geckoes and house geckoes. Leopard geckoes take 1-2 months to hatch depending on temp and house geckos take less than five weeks if the temp is right. My guess would be between 1-3 months.
I just saw a turtle lay its eggs in the grass by my house and I want to know how long it will take for the eggs to hatch so I can keep an eye on it to help them from their predators.