Speech in summer when school is out?

My son is 4 and half going to be five in november. During the school year he is in early child hood speech and language program 4 days a week because he doesnt talk, he does but he is at a 2 year old level. And since school has been out he has been attending summer school and will be attending that until july 15th. After that there is nothing until school starts in september.My question is should he be getting speech from the time summer school is out till when it starts again or will he be fine for about 6 weeks without it.