[deep thinker]

One more thing on times, a pushing tide I find normally works good, allthough some places you can only dive at low. Other people will prefer hunting a high tide or low tide but that normally depends on what your after. In heavy kelpy areas I prefer high tide as its easier to swim through the kelp
As for times of day, any time is fun to dive but I find more fish activity either relatively early in the morning and early evening a hour or so before sunset, this applies more to very shallow areas I have hunted, depth being anything from half a meter to 2m.
When hunting from a boat very little of the above applies except for what wind cleans and flattens out the water. When on a boat you can drift around anywhere and be able to find fish activity throughout the day as it seems fish in open water act differently than the ones closer to shore...