Steady winds. You can find 30 knots in the end of the beach (sideoffshore) and on the other side 13 knots (sideonshore). You can find your ideal condition along the beach. It is not windy every day, but you have a wind chance of around 70%.
100 km from Santiago. Take the 78 towards the coast and to San Antonio. From San Antonio drive south along the coast to Santo Domingo. To get to this beach you need a 4x4 car. If you don't have it you can kite in Santo Domingo town.