The winter is the toughest time of the year to fish for snook. As water temperatures fall into the low 60s, the bite becomes very tough. If water temperatures drop into the upper 50s, the bite becomes almost impossible and if it reaches the mid-50s, there is a good chance there will be a fish kill. Snook do not do well in colder water temperatures. The key to catching them during the winter is finding the warmer water back in canals, tidal creeks and rivers. Warm water discharges will congregate snook and the spring-fed rivers can also be good because they maintain a constant temperature of 72 degrees near the springs.