What is Barometric Pressure and why does it affect fishing?
All anglers know that the barometric pressure has an effect on fishing. How the pressure directly effects the fish may still not be an exact science, but some understanding of how to use the barometric pressure readings along with other natural influences is a part of the puzzle to increase your chances of fishing into catching.
Question: How many days does it take for fish feeding to
stabilize after the passage of a front?
What is barometric pressure?
Barometric pressure, also known as atmospheric pressure or air pressure is defined as
the force exerted by the weight of the atmosphere pushing down on a given area.
A barometer reading of 30 inches (Hg) is considered normal.
But it's not so much the actual number reading as the
trend the readings are taking.
How does barometric pressure affect fish?
A fish senses pressure changes through its air bladder.
Fish with large bladders quickly sense when the air pressure is dropping,
because there's less pressure on their bladder.
Does Low Pressure mean slow Fishing?
Fish are much more comfortable when there's stable high pressure, and will tend to feed actively most anywhere within the water column. Also with passing of several cold fronts in quick succession with cycles of high and low pressure definitely changes how fish react to pressure changes.
The fish can sense that the pressure is dropping in front of storm system. So, as the high pressure begins to dissipate, the fish respond with a change in feeding patterns. Fish often feed heavily right before the pressure drops. When the front passes and high pressure moves back in, the fish may not feed aggressively for at least 24 hours, since they're still adjusting.
"However, it's a different story a day or two after a high settles back in. The fish will have had time to stabilize and an intense bite can occur. When the pressure changes again, such as when another front moves in, the cycle repeats itself."
Baitfish are also affected by barometric pressure. For example, falling pressure may force the bait to hold deeper and become less active, which would impact the fishing in the middle and upper levels of the water column.
Along with Barometer / Pressure some other natural and some unnatural influences on fish behavior.