North of Buenos Aires - before the Tigre delta - access to the vast expanses of the fresh-water 'sea'.
The best season of winds is as of the spring that is of the month of September, being with more fluidity winds of Southeastern the South sector/or this with good force (between 15 and 25 knots). These winds are good generating of waves that go of the same direction like the corented one.
Thermal winds generated blow offshore and can be dangerous - the estuary is about 230km wide. Also watch for other water craft.