Fishing with a top water is unmatched. The jumbled mix of trebles, rattles, and a carefully crafted knot, nestling itself flawlessly off of a shallow grassy point. Waiting for that ravenous flats predator to strike…that is the kind of thing that will take your breath away.
I don't think that there is one condition in particular that you should use a top water. I think that there are too many to mention. Granted, I typically use tops when the temperature is 60 degrees or higher (although I have caught great fish on tops in 40 degree weather). I also prefer to use them at sunrise or sunset, right before a front approaches, or when I am fishing stained water; but I think that it is ok to use them any time. Nothing provokes an aggressive strike like a top water lure.
However, you have to match the type of top and the presentation to the different conditions. Sometimes the twitch, twitch, pop, twitch, twitch, pop needs an occasional pause or two; and sometimes you need to work it fast - other times REAL SLOW!!! It depends on what the bait is doing. Is the bait popping every few seconds, every few minutes, in fast spurts, in slow spurts? Yu have to read the water to best determine how to initiate your retrieve. The tempo and presentation of the retrieve will elicit success or failure.
You also have to determine what you are casting to. I usually look for some sort of isolated structure in a flat or for the fish feeding highway (potholes, guts, channels…..next to shallow water). Once I find that structure, I throw at it and if the fish are hungry - they will come from a great distance to smash my lure. BAM! My favorite tops are the bone, trout, and clown super spook junior. However, if the fish are foraging on larger bait, I will use the super spook (in the same colors). I have had a lot of success with those lures. My best advice is to throw the top water plug that gives you the most confidence, because that plug will be the one that brings you the most fishing success. And is you are nervous about when, where and how to work a top water lure, just try one out for 20 minutes or so on every trip and see what happens. Good luck fishing! :brew: