You may experience showers but not heavy. During monsoon the scenic beauty of Goa is fresh and unique. The beaches remain crowd less this time and you can get your every requirement in an affordable rate. Check out the following link https://www.funstay.in/homestay-in-Goa for best beach resorts.There are many parties and celebrations held in August to welcome the rain. If you intend to travel by train, you should be aware of the frequent landslides on the Konkan railway.