You have to calculate it on your own for now, but according to network hashrate it should go from 7.7 to about 16, because for now blocks are solved in about 1.2 min, if they where solved in 2.5 min difficulty would stay the same, also max difficulty change is 4x.

Difficulty changes after 2016 blocks, so you can estimate next time it changes by just multiplying remaining blocks by time in which they are solved.