Goa in monsoons is a good option because 1. it is super cheap now, 2. The place is v less crowded but the drawbacks are that very less shacks are open at this time of the year and due to heavy monsoons in western india, becahes may be closed.
It's still raining in Goa even today. if you enjoy rains, do come to Goa. if you are coming to enjoy Beaches, that won't be possible this week, looking at the weather. However, if you enjoy nature and want a relaxed vacation, you can come.