is it usual from google to visit the first day?
 

I am currently building my website and since it isn't finished yet I usually take it offline again, however forgot to take it offline and checked the stats and saw 41 visits from google spider and about 8 unique visitors.
Is this normal that the first day leaving a page running that unique visitors come and check and google bot?

Pretty normal if there's a link to it anywhere, you submitted it or search for the domain in Google search.