As I mentioned, I believe you can throw a topwater for bass any month of the year, but you should keep a few things in mind if you want to improve your chances of landing fish. From experience, the best time of day to throw a topwater lure is: 1. Right when the sun rises and hits the water 2. At sunset, when it's just about to get dark 3. Low light, overcast days Ideally, you want the water to be still and smooth as glass. Fewer waves mean more erratic movement solely from your topwater lure, allowing the bass to focus on what's making all that noise for that reaction bite.