If you are beach lover..check for South Goa, Kovalam ,varkala beach and if time is not an issue then you should prefer Andamans island because it will take almost 6/7 for a proper trip. For mountain, you should explore Palampur in Himachal,if you have not visited there yet
It depends on where you are currently located but here are a few destinations that will be wonderful to visit in this season:
Hampi
Coorg
Gokarna
Kodaikanal
Alleppey-Kumarakom
Udaipur-Jodhpur
Shillong-Cherappunjee
Pondicherry
Auli
Rann of Kutch Pokhara, Nepal There are uncertain rains in a few regions so do take a look at the weather forecast before planning your travels. Travel Safe and have fun mate!
Johdpur , Jaisalmer should be on your travel cards if you love to experience heritage, desert experience. Kutch nahi dekha to kya dekha , rann utsav in kutch is also good choice provided you are ready to spend good bucks on to it.