Snook will move back towards the mouths of rivers and tidal creeks, on the flats and in the bays during the fall. Snook can be found in most of the same areas that you found them during the spring. These fish will feed actively throughout the fall as they are fattening up before winter arrives. Towards the end of fall, passing cold fronts can push good numbers of fish into the rivers and tidal creeks. As water temperatures fall, snook are going to seek out the warmest water they can find.