It may be for this year,but put it up now and by next year the new smell will be gone and the birds will have probably had a good look at it and be used to it so that they're more likely to use it.
Birds can take a while to accept the presence of a nesting box - so you may not get any lodgers this year but it will be there at the start of the season next year. And winter roosting too as tilly2 says
We got boy #2 a really nice bird box with a camera and audio (it was really cheap from Aldi), unfortunately it is still empty but it will be lovely when something starts to live in it.
I was told recently by an avid bird watcher that if you have bird boxes, they have to face East, otherwise the birds won't use them, I'm going to move mine and hope!......