Well I moved to a shallow river deepest hole 30 feet and good weed development along shoreline up to 10 feet. Heavy boat traffic in July as it is a UNESCO world heritage site so the big cruisers make their way along the waterway, With the river only 50 yards wide a fast moving cruiser's wake stir the soup up so at times the shallows are muddy and visibility is poor down there.

Anyway earlier this summer I was having a great time casting frogs and senkos in the weeds and catching lots of LMB. Now the bite is much tougher. Also when I do catch there seems to be more SMB. Fish seem to be more spread out as I see fish jumping all over expecially out in the channel. There is little structure out there. No weeds , no rock, just a flat bottom. I tried fishing the mudline edge with no success. I tried flipping jigs and weighted as well as weightless senkos between the weeds at various depths. The deeper weeds look interesting but up to now have produced no fish.

Thinking that I may try crankbaits next along the deep weed edge. Any other suggestions. Of course when the boat traffic is heavy I cannot fish near the channel. Those 30 to 40 footers throw a big wake and the speedboats are just too fast for me.

Dunno -without knowing what's going on in the food chain.

Ideas (from a distance):

Work deeper -outer weed lines and any hard structure/cover nearby -as you suggested. Should find your LMs there.

-You describe what sounds like it might be connected to the Great Lakes/St Lawrence (?). You also mention fish breaking. I wonder if shad or alewives are spawning now, and drawing fish away from shorelines -even away from cover (esp SM).

-Might try some UL stuff -finesse worms and grubs n such -near hard structure/cover outside the weedwalls. Might be that you now have lots of YOY (young of the year) fishes and bass are concentrating on them.

Just some (distant) thoughts.

Out of curiosity: Do you know the surface temps in the areas your now not catching in?

We are on the Rideau River. Temperatures get quite warm although I have no reading today. Will get one tomorrow. I am catching smaller LM and some SM shallow now but the bigger fish are just not hitting shallow like they did earlier in the season. I will be trying finesse techniques on outside weedline closer to deeper drop-offs tomorrow.

The river is 80 degrees now. Fish seem to be more scattered. Getting smaller fish in the weeds. Caught one larger LM casting a spinnerbait on the outside edges. Otherwise most fish have been 2 pounds or  less. Yesterday I tried frogging which produced 10 smaller fish, Senkos, T-rigged and mostly fished cover. Had a few numbers but a fish here and a fish there. Docks and cover bordering deeper water were most productive. Shallow bays with cover were much less with only a few smaller fish. I am guessing that I should be looking for deeper cover as the water warms and fall approaches.