Low pressure or approaching typhoon. Fish swim bladders expand, increasing activity. However, prioritize safety in rough weather.

Typical pressure range. The direction of pressure change (rising or falling) affects fishing more than the absolute value.

Clear weather under high pressure. Fish swim bladders compress, causing fish to sink deeper. Target dawn/dusk or tidal movements.

Strong high pressure. Fish tend to stay near the bottom with reduced activity. Slow presentations near structure are effective.

When pressure drops, fish swim bladders expand, causing fish to rise and become more active. They feed more aggressively. Times before low pressure systems or rain are prime opportunities.

When pressure rises, swim bladders compress, causing fish to sink deeper. During high pressure clear weather, fish tend to stay near the bottom with reduced activity.