The plus side to the summer is that a fish's metabolism increases and therefore they have to feed more often. The bad news, however, is that their food source is also more readily available and bass are more likely to feed at night and/or will move to locations harder for you to find or to fish. Shore fishing (especially from larger impoundments) can be rather limiting in this regard. But some bass will remain relatively shallow-which is good for you.
If you absolutely have to feed when the sun is higher, find weed edges and shaded areas where bass are more likely to hold. Put away your fast moving baits for now. Slow down and fish soft plastics (worms, crawdads, lizards) methodically. If you can reach matted vegetation or moss, cast out to it with a hollow bodied frog or mouse-but be sure to use a stout rod and heavy line as pulling the fish through the stuff is three quarters of the battle. If you haven't had so much as a bite, though, catching may be less critical than just getting bit.
Summer fishing is a challenge for most fishermen but especially for bank fishermen. Between the heat/humidity/bugs/stinging nettle, poison ivy, etc. it can be maddening. Determination is good but not if it means a case of heat stroke and not if it means throwing out the baby with the bathwater if it isn't working out. Maybe it's time to put up your gear for awhile. Find another hobby.