Anytime! The guides are really good at spotting gators! Sunny days are good since you will usually get "sunbathing" gators.
I would say some time in the middle of the day because the animals are out basking in the sun and it is a great way to best the heat. Definitely eat after you take the tour to avoid feeling rushed.
It gets pretty hot & humid so for cooler temps I would choose a morning tour. The breeze is nice while on the boat but the sun can be piercing.
Thanks! Your answer is awaiting moderation.