Diff seems to be increasing in quite big steps.

Difficulty History
Date Difficulty Change Hash Rate
Sep 25 2016 241,227,200,230 6.82% 1,726,771,560 GH/s
Sep 12 2016 225,832,872,179 2.30% 1,616,574,667 GH/s
Aug 29 2016 220,755,908,330 1.56% 1,580,232,344 GH/s
Aug 15 2016 217,375,482,757 7.67% 1,556,034,316 GH/s
Aug 02 2016 201,893,210,853 -5.43% 1,445,207,896 GH/s
Jul 18 2016 213,492,501,108 0.04% 1,528,238,850 GH/s
Jul 04 2016 213,398,925,331 1.88% 1,527,569,009 GH/s
Jun 21 2016 209,453,158,595 6.83% 1,499,324,110 GH/s
Jun 08 2016 196,061,423,940 -1.63% 1,403,462,340 GH/s
May 24 2016 199,312,067,531 2.60% 1,426,731,353 GH/s
May 11 2016 194,254,820,283 8.73% 1,390,530,167 GH/s
Apr 28 2016 178,659,257,773 -0.01% 1,278,892,782 GH/s
Bitcoin Difficulty: 241,227,200,230
Estimated Next Difficulty: 259,869,959,857 (+7.73%)
Adjust time: After 1599 Blocks, About 10.5 days
Hashrate(?): 1,985,788,007 GH/s