Pack some nice homemade food, cause this isn't a short trip !
There are direct flights and trains for this journey. kolkata (West Bengal) to Goa (Goa) distance is 1709 km and you can get there by flight in just over 4 hours and 5 minutes or by train fares starting from ₹ 633.
The weather at Goa is varying from "nice" to "hotter than nice".