Hi Yusuf! Its monsoon in the mountains right now. I don't think this is the best time to go there. You can instead pick any one of these, 'Places to Visit in Monsoon in India' (goo.gl/gfRvP1).
You can surely visit Goa in the monsoon season. Though it is an off season, you can still enjoy a lot. Open my blog to read my post about Go in The Monsoon Magic Time.
Hello! March to June and is the best to visit Kasol. However if you really want to go in July, you should plan it in the first week before the full monsoon downpour. Be sure to visit Tosh, Chalal, Manikaran while you're here.
I hope you enjoy, be safe.