Fish bite better when the pressure is high and stable high.
Fish don't tend to bite as well during low pressure so it's better to fish during high barometric pressure.
When it comes to fishing and barometric pressure anything below 29.8 is designated as the low-pressure zone, meaning poor fishing.
Above 29.8 is the high-pressure zone, meaning average fishing.
The zone between 29.8 and 30.2 is shown as the area for best fishing.
Low pressure causes the swim/air bladder to expand, which many believe causes fish discomfort and causes them to retreat to a lower depth where the higher pressure relieves this bloating sensation.
Conversely, higher pressure can cause certain species of fish to suspend.
Typically, the best times to fish are when the tide is “running” that is, when it's on the move from high to low or vice versa.
Once the water approaches the extremes of high or low tide, it slows down and stops moving, becoming what's known as “slack,” and the fish are less likely to bite.
High Pressure (30.50 +/Clear Skies) - Fish bite Medium to Slow in deeper water or near cover while fishing slowly.
Medium Pressure (29.70 – 30.40/Fair Weather) - Normal Fishing using different gear or baits to meet the needs of the fish.
Low Pressure (29.60 and under/Cloudy/Rainy Weather) - Fishing Slows.
When the barometric pressure drops, it's an indication that a cold front or storm is on its way.
The organ that is most sensitive to barometric pressure, is a fishes swim bladder.
Fish with larger swim bladders, are the most sensitive to changes in atmospheric or barometric pressure.
The best time to go fishing is typically either early morning or late evening when food is abundant and fish naturally feed.
Within an hour of sunrise and an hour after sunset are the times when fish are likely to bite the most.
Fishing for some species of fish is much better at night than during the day.