Walleye: Turnover

Autumn cooling and wind can erode stratification and mix a lake. Timing and extent depend on depth, exposure and previous thermal conditions. Not every waterbody stratifies strongly, and different basins need not mix together.

The mechanism on this page hits walleye and bass alike — a few scattered, off-colour, tough days while the lake mixes — but what comes out the other side means more to a walleye angler than to anyone else. Stratification was the wall that organized the whole walleye summer: cool-but-oxygen-poor water below, warm water above, fish squeezed into the band between. Turnover demolishes that wall. With temperature and oxygen nearly uniform top to bottom, the entire lake becomes livable at once, and walleye scatter through depths that were closed since June — one of the main reasons the post-turnover weeks feel like the fish "disappeared" before the fall patterns snap in.

During the mixing itself, use the article's geography as written: it is not uniform. Fish the main lake and windward, current-touched areas that turn late or barely stratified water that never turns at all — river-run walleye and shallow, wind-mixed lakes skip this whole drama. Right after, stop trusting summer depth rules. Fish can be at 3 m (10 ft) or 15 m (50 ft); let bait schools on your electronics, steep structure, and wind-blown rock pick the depth for you.

One walleye-specific bonus: the cold, oxygenated deep water reopening often pulls cisco and whitefish movements shallow, and big walleye follow. Takeaway: endure the mixing week, then treat the lake as one open building — the fall and night-bite patterns on the next pages are what move in.

Turnover — Largemouth · Smallmouth · Pike · Muskie · Crappie · Trout · Perch

Turnover

FAQ

What does fall turnover do to walleye fishing?

Turnover — the week or two when a stratified lake's cooling surface water sinks and the whole column mixes — is the most honest excuse in walleye fishing. The mixing erases the temperature and oxygen boundaries that had been organizing fish, drags murky, low-oxygen bottom water through the column, and scatters both bait and walleye lake-wide; catch rates genuinely crater. The playbook is avoidance: fish rivers and shallow, wind-mixed lakes that never stratified and never "turn over," or hop to lakes of a different size and depth, since turnover staggers across a region by days or weeks. On the affected lake itself, the recovery is the reward — once the water clears and stabilizes at cool, uniform temperatures, the fall regrouping bite comes on hard.

Underwater Ecology