During changing, unstable weather and dramatic temperature changes, fish feed sparingly. Every species has a temperature preference, the temperature at which they are most comfortable. They will seek this temperature all during the year. Turbid water or cloudy days cut down light penetration, encouraging nocturnal feeders to forage during day-light hours. Also, many predatory fish will feed throughout the day in shallow water, even in hot summer weather.
Barometric pressure seems to provide fish with the same stimulation as water fluctuations.
Falling pressure influences fish to become more active along shorelines, whereas rising pressure leads to a decrease in fish activity and poorer fishing. Wind action creates alternatives in the fish's environment. On a cool, windy summer day, the windward bank may present temperatures and oxygen levels more favorable to his disposition. Wind may also concentrate forage. Wind direction does seem to affect fishing.