Day 1 - North goa Reis margo fort, Museum of goa, Aguada fort, calangut beach, baga beach, anjuna beach, Vagator beach, Chapora fort.
day 2 - (Old goa)
Panaji street art project,Fontainhas, Immaculate conception church, Balisica of bom jesus, Se cathedral, Museum, Chapel of our lady mount, Divar island, Safa masjid, Shri mangesh temple, Ponda, Goa.
Day 3 - (South goa)
Conacana village, Rajbaugh beach, Palolem beach, Agonda bay and beach, Cola beach, Butterfly beach (Can be visited if its not raining and with help of boat), Cabo de rama fort, Colva beach, Heart shaped lagoon.
Day 4 -
Jungle trek to Dudhsagar waterfall (for experienced trekkers only or go with local guide) or trek to Tabdi surla falls and temple I made this itinerary for myself but unfortunately I couldn't made it to visit all of this due to time constraint. It's really worth to visit even in monsoon. The beauty of goa can be seen at its peak. You can read my experience of goa here - https://www.tripoto.com/trip/monsoonyatra-5d39993493907
Last year in the month of August I visited Goa & it's beautiful in Monsoon you get to view the beauty of the place ,Chill weather no humid climate ,less crowded and you get a hotel in a budget price comparitively to a seasonal price hotel. South Goa beaches are pristine and clean North Goa u can visit Anjuna beach Arambol beach.
Day 1 - reach Goa, relax, beach walk, enjoy night life
day 2 - North goa- Arambol beach, Kalacha sweet water lake, Coco Beach, calangutband Baga beach, watersports
day 3 - South goa- Panjim, Local shopping, scuba diving, cruise ride in night.
day 4 - proceed to airport or train
Try Bogmalo Beach near Dabolim Airport.. It's complete isolated beach with some awesome beach front restaurant n bar.. u can stay there in a beach front home stay Leon's Hide Out.. Try Day Trip to western ghat hills via Arvalem caves n waterfall U must try 3-4 KM trekking to Dudhsagar waterfall for a breathtaking view of Gorgeous Dudhsagar.. Try Spice garden visit near Ponda