several more questions to be asked.
what technique are you fishing? topwater for example isnt going to be the most productive thing you can do while the sun is still high and the temps are still up there. find channel breaks where bait is close by and fish a deeper running crank bait or slow roll a spinner bait.
what are you fishing for? i know you said you mostly bass fish. but are you hitting schooling/feeding 13 inch bass at sundown? if thats what your doing then yes you will more than likely have a short window of opportunity.
are you fishing for bass that are hugging wood? if you are these fish might be so far back in the jungle that you arent getting your bait even close to them. if this was the case you might go to 60lb braid and a 3/4oz jig, gently nose the boat as close to the cover as you can without disturbing it and take a 7+ft flipping stick and quietly lower the jig into each pocket within the cover and lower and raise and repeat, sometimes you have to really aggravate the fish to trigger a bite.
chnge it up, eliminate the things that dont work, if it doesnt work at 5pm for 3 straight days its probably not going to work on the 4th day. im never afraid to blank...it is a systematic approach to eliminating bad water, and with each type of water comes a specific technique best suited for that water.
and if all else fails a tube of crickets and an ultralight rod and a mess of big gills will pass the time until the bass bite starts.
also live craws fished with small splitshot will catch about anything that swims this time of year.
good luck