The weather app for the bite
Knowday reads the barometric trend, the ripple on the water, and the cloud cover — the things that move the bite — then tells you when today's worth fishing.
Today · your water
What matters on the water
The pressure trend fish feel
Anglers know it: a falling barometer ahead of a front turns the bite on, and a rising one shuts it down. Knowday reads the pressure *trend* — not just today's number — and weights it above everything. This is the one most weather apps never touch.
A little ripple, not a chop
Glass-calm water spooks fish; a hard chop is miserable. Knowday reads for the gentle breeze that breaks the surface and gets them moving.
Overcast over bluebird
Fish often feed harder under cloud than a high, bright sun. Knowday reads the cloud cover so a grey day reads as the opportunity it is.
Comfort and rain on the boat
The feels-like for a long sit and the rain window for the run back — the comfort reads that round out a day on the water.
How it works
The barometric pressure trend is the deciding signal — falling or steady before a front reads as an active bite — alongside a light ripple, cloud cover, comfort, and the rain window.
Two honest limits: water temperature isn't tracked yet, and it's a big driver of what's biting, so factor it in yourself; and Knowday reads the weather, not the rules — check local seasons and limits before you go.
Fishing is one of fourteen plans Knowday reads — walks and rides, the lawn, the garden, camping, the night sky, and the water.
See all plansNo catch
Free to use. No sign-up. Your location is only used to fetch your forecast.