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Low pressure and fishing
Posted on 7/8/25 at 9:59 am
Posted on 7/8/25 at 9:59 am
Went offshore last weekend. Had a slow start at first. Snapper were not cooperating and when they did the man in the grey suit was getting his share.
Eventually they turned on and we went home with a nice box of fish, i noticed that there was a storm near us and felt the temp drop. From inshore experiences, just before a storm they go into a frenzy.
I was thinking the low pressure helped. Anyone disagree?
Eventually they turned on and we went home with a nice box of fish, i noticed that there was a storm near us and felt the temp drop. From inshore experiences, just before a storm they go into a frenzy.
I was thinking the low pressure helped. Anyone disagree?
6
Posted on 7/8/25 at 10:39 am to freshtigerbait
Falling pressure, low pressure, is good for the swim bladder i believe
Posted on 7/8/25 at 10:41 am to freshtigerbait
It's common knowledge that fish bite better when the barometric pressure is falling.
Most good fishing camps have a barometer on the wall
Most good fishing camps have a barometer on the wall
Posted on 7/8/25 at 10:41 am to freshtigerbait
I went this Sunday that just passed and we couldn’t buy a bite from a snapper in the morning hours. A little storm did come through and we caught fish after but I think it was more because of the tide slowing down. The water was ripping way too hard/fast when we got out there.
Posted on 7/8/25 at 10:43 am to freshtigerbait
Deer hunting also in my opinion. Partly cloudy to overcast always seem to be better days.
Posted on 7/8/25 at 1:42 pm to Purple Spoon
How deep were those snapper? It’s mathematically almost impossible for atmospheric pressure to have any impact on fish in deep water. I think there is a correlation but it’s not direct and definitely not causal.
Posted on 7/8/25 at 2:00 pm to hall59tiger
200'
Posted on 7/8/25 at 3:09 pm to freshtigerbait
A thunderstorm typically drops atmospheric pressure 2-10 hPa over a course of 6-24 hours
Water is much more dense than the atmosphere.
Moving up or down 1 cm in water is equivalent to 1 hPa pressure change.
So a severe thunderstorm changes pressure on a fish over a 6-24 hour period that equates to about a 2-10cm depth change in water. A fish at 200 feet is experiencing 6100 hPa so a change of 2-10 hPa would most likely go unnoticed.
Water is much more dense than the atmosphere.
Moving up or down 1 cm in water is equivalent to 1 hPa pressure change.
So a severe thunderstorm changes pressure on a fish over a 6-24 hour period that equates to about a 2-10cm depth change in water. A fish at 200 feet is experiencing 6100 hPa so a change of 2-10 hPa would most likely go unnoticed.
Posted on 7/8/25 at 4:13 pm to hall59tiger
Mama said it’s cause they got all them teeth but no toothbrush
Posted on 7/8/25 at 6:50 pm to freshtigerbait
The barometric pressure certainly affects them. And which is better, High or low pressure, depends on the person and the style of fishing
During my bass fishing time, I always preferred high pressure over low pressure. But for salt water, it is different
During my bass fishing time, I always preferred high pressure over low pressure. But for salt water, it is different
Posted on 7/8/25 at 9:49 pm to hall59tiger
quote:
So a severe thunderstorm changes pressure on a fish over a 6-24 hour period that equates to about a 2-10cm depth change in water. A fish at 200 feet is experiencing 6100 hPa so a change of 2-10 hPa would most likely go unnoticed
I agree with this 100%. Science is science!
But theres also a reaction in the smallest baitfish at the waters surface that is created from pressure changes. It’s highly likely changing the feeding habits of every predator species below it. The deeper fish aren’t spunked up due to the pressure, it’s because of the sequence of activities that lead all the way down to them.
Posted on 7/9/25 at 6:38 am to freshtigerbait
We hammered the snapper yesterday, and didn’t get sharked until we started fishing mangroves. First time this year we nearly escaped the tax man. Did lose a big mangrove to the biggest bull shark I’ve seen to date, he was at least 8’. Usually don’t have them hit mangroves. They sorely need thinning.
Posted on 7/9/25 at 11:22 am to JoeWeDidIt
I believe there is a correlation but, again, I don’t think it’s causal. Ice cream sales go up when murder rates go up but that’s due to temperature increases.
To me, it’s more likely the other environmental changes that occur with atmospheric pressure changes are having a more direct impact. Usually pressure changes are associated with thunderstorms that bring cloud cover and wind, two things that are far more likely to influence fish behavior.
We can’t know any of this for certain but this idea the old myth that pressure changes impact the swim bladder of fish which makes them less hungry is certainly false for most fish and probably false for all fish.
To me, it’s more likely the other environmental changes that occur with atmospheric pressure changes are having a more direct impact. Usually pressure changes are associated with thunderstorms that bring cloud cover and wind, two things that are far more likely to influence fish behavior.
We can’t know any of this for certain but this idea the old myth that pressure changes impact the swim bladder of fish which makes them less hungry is certainly false for most fish and probably false for all fish.
Posted on 7/9/25 at 11:31 am to LanierSpots
quote:I am so bad at this that I just basically stopped trying.
During my bass fishing time, I always preferred high pressure
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