Question: is 5'7 tall for 13 year old boy?
Answer: Yes. 5'7′' is normal for a 13 y.o. — just taller than “average”. People in the world vary in height a lot, so “normal” has a very broad range. Another 13 y.o. can be 5″, or 4′7″, or taller than you at 5′9″, and all are normal — some closer or farther than the average, but months of age difference count, too.