storm, barometric pressure readings will be low – about 26 to 29, in general...But as the storm moves out, the barometric pressure will begin to rise. The pressure will gradually creep back up to normal. If it gets higher than 30 inHg, it can be considered a “high pressure” day. How Does Barometric Pressure Affect Fishing? If you’re an experienced angler, you probably already know that the weather impacts fishing. Therefore, it stands to reason that barometric pressure impacts fishing, too, since it affects the weather...Here’s how. Physiological Changes Although fish are far beneath the surface of the water, they can still sense the changes in atmospheric pressure. This is because their organs experience a change of pressure. Fish feel the changes in barometric pressure via their air bladders, also known as swim bladders. These organs are inflated air sacs that help fish maintain their buoyancy. When the barometric pressure goes down, the air bladder will inflate to accommodate for the lessened pressure. When it rises, the bladder will shrink. These organs, responsible for helping to keep fish afloat, will experience pain and discomfort as the pressure changes. They may have a more difficult time staying balanced, too. To a fish, an inflated swim bladder will feel like a bloated belly for a human. Not comfortable, right? That’s why they want to move around to get rid of the pressure in their bellies. This change is especially pronounced in small fish. Fish that are naturally tiny may feel the effects of pressure changes more easily than those that are larger.
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