Srormcloud great question, one that has been asked for years. I for one do not like to fish the day after a cold front passes with a moderate northwest wind and clear skies, which relates to a rise in pressure. As a cold front approches from the west the wind change from a south to southwest and finally to the west northwest as the front moves through. Surface pressure will follow, what I mean is pressure will continue to fall as the front gets closer then begin to rise behind the front. As summer gets closer the fronts become weaker (less cold air) so the pressure changes are not as severe and as such fishing should not be affected as much. Best time to fish is when you can.