IPhone 7 is going to release this year?

Should I still get an iPhone 6s now or wait till this fall?

It's coming out in late September as always. If you have a decent phone now, I would just wait.

Yes the 7 is going to come out this year.

As far as getting the 6s, basically up to you. 6s now or 7 in 5 months

Depends if you want to always be waiting or not.