The Bite can still be good in the heat of the summer on Lake Okeechobee you just need to take time to slow down and disect areas more thoroughly.
Early morning being the best time for topwater, but when that sun gets up you need to switch your game and slow way down find some thicker grass with scattered grass nearby.
Cast to the smaller open areas that look like a good ambush spot for a bass and do what we call dead sticking, just let a stick worm or trick worn just sit there and move it only a few inches at a time.
The outside grass lines have been good for numbers of bass being caught throwing Rattle traps, small Crankbaits and Spinnerbaits.
The Big bite has been found Flippin' the thickest stuff you can find, with the very few bites you get they can be very rewarding.