Fishing in September
September is the month the water starts to fall. Fish notice before the calendar does: feeding picks up sharply, baitfish shoal tightly, and predators begin to follow them in earnest. In many northern waters it is one of the most reliable months of the year - and it arrives just as the crowds go home.
Last reviewed 26 September 2026 · Editorial policy
What the water is doing
Cooling water speeds fish up. Feeding windows lengthen, the middle of the day stops being dead, and fish move off the warmest shallows onto deeper ground where they can feed and retreat at the same time. For a few weeks the water has warmth left in it and the fish have appetite - a combination that does not return until spring.
On the bank, look for
- Baitfish are the map. Where small fish are being driven into a corner or over a shallow bar, work the edge of that bunch rather than open water.
- Cooling water means fish are deeper than they were in August, but nowhere near winter deep. The transition between shallow feeding water and deep holding water is the classic ground.
- The first true autumn weather - wind, rain and cloud - often triggers the best day of the month.
What to change this month
Go back up in size
Fish feeding hard before winter take larger baits than they did in the heat. This is the month a big presentation starts to earn its keep.
Fish the drop-off
Work the transition between shallow feeding water and deep holding water, and change depth until you find the layer fish are showing in.
Prepare for shortening days
Daylight drops fast in September. A session that ran to eight in August is down to six now; plan for it while the water is still warm enough to be good.
Fish worth chasing in september
Photos from Wikimedia Commons under free licences - credits on each species page.
Techniques that suit this month
Conditions that decide the day
Where this shows up
Guides worth reading first
Watch out for
- Many salmon and sea trout waters close during autumn, and the dates are fixed and published. Never assume a river that was open in August is open now.
- Some trout species begin spawning in autumn and are protected or best left alone. A fish sitting in a shallow, gravelly run is not feeding.
- Autumn storms and rising rivers make banks unstable. A well-known swim can be undercut after one night of rain.
Questions about fishing in september
Is September the best month of the year?
For many species it is close to it. Water is still warm enough for strong feeding, the crowds have gone, the light is lower, and the fish are moving into a predictable pattern before winter.
Do fish really feed harder in autumn?
Yes. Cold water slows digestion and feeding, so fish in temperate climates put on condition while they can. That autumn feeding period is often the best chance of the year at a big fish.
What changes between August and September fishing?
Light, water temperature and depth. Fish move off the warmest shallows onto deeper ground, sessions start later and end earlier, and a bigger, slightly slower presentation improves.