The salmon season does not end together on every river. The Tweed fishes to the end of November. Most other rivers close between September and the end of October, and some of those close within days. Check your beat's dates before you drive anywhere. Where water and time remain, the back end is among the best fishing of the year, and it turns on one event: the autumn spate.
Why the spate matters
Fish held in the estuary and the lower river by low water move when the river rises. The rise lifts them, sends them through the pools and over the shallows, and carries them upstream.
A salmon does not feed in freshwater. When it takes, it is responding to something other than hunger, and a fish that is running is not in that mood. Fish pushing through on a rising river are travelling, and the fly passes over them. The rising river is for watching. Fish the fall.
Fish the fall
The fish take when they stop.
As the river peaks and begins to drop, running fish settle into the first holding water they find: pool tails, the slack behind boulders, the inside of bends, the edge of the main flow where it slows. They are fresh, they are fit, and they are in places you can predict.
The best fishing comes on the falling limb, once the river has started to clear. On most rivers that is the day after the peak and the day after that. A big catchment is slower than a small one. A steep spate burn is up and down in hours. A river fed by loch or lowland drainage can hold its height for days.
Three signs mark the moment:
Height. The gauge has peaked and is dropping steadily. A level still climbing is not worth fishing.
Colour. Chocolate brown is too thick. The fish must see the fly. The water is right when it has cleared to the colour of weak tea and you can see your wading boots to the ankle.
Temperature. In late October the water is usually 6–11°C, falling toward 4–8°C by late November. Below 10°C the fish will not move far for a fly. They take one presented slowly, close to the bottom, and close to their noses.
Tackle and tactics for cold, coloured water
Fish the fly deep and slow.
Line. A sinking tip or a fast-sinking head. On shallower, clearing water a floating or intermediate line and a weighted tube will do.
Fly. A tube or a heavy-wire single, 1.5 to 2 inches, dressed with weight at the head. In coloured water use black and orange, black and yellow, or a Willie Gunn. As the river clears, go smaller and sparser.
Presentation. Cast across and slightly downstream. Mend upstream once to slow the swing. Keep the line under control, and let the fly come round slowly and hang in the dangle at the end. Do not strip it. The take comes as the fly slows at the tail of the swing.
The take. Do not strike. Drop the rod point and let the weight of the fish tighten the line.
Coverage. Step down one pace, or one yard, between casts. Cover the pool completely before leaving it.
The fish you catch
A back-end salmon is often dark and coloured, and the cock fish carry a hooked lower jaw, the kype.
These fish are close to spawning and carry the next generation. Release is now mandatory on many rivers: in Wales and on the Dee, Wye and Severn, on Scottish rivers rated in poor conservation status, and on a large share of Irish rivers (40 of the 72 open in 2026 are catch-and-release only). Elsewhere the rules differ by country, river and date. Assume release unless your permit and the current regulations say otherwise. A coloured autumn cock fish is no table fish in any case.
Play the fish firmly and quickly. Keep it in the water. Handle it wet and lightly, and let it recover facing the current before it goes. If it will not swim off, support it until it does. Never lift it out for a photograph, least of all in frosty air.
Late salmon lie on or close to spawning gravel. Keep off any pale, cleaned patches when you wade.