Calcasieu Pass Lighthouse tide
 

I see this lighthouse tide referenced in a tide chart. Is this the best tide to look at for fishing the jetties?

How long after a low tide does it take for the tide to start moving again - how long is the normal slack period?

The lighthouse tide is ok for the jetties if there isn't any wind for 12 hours or so before the time of interest. A south wind pushes water into the Calcasieu estuary and a north wind or a south wind stopping pushes/lets water flow out. The wind can be as big or bigger an effect as the lunar component of the tides. It's a pretty good bet that the tide will fall in the afternoons if a strong falling lunar component is predicted unless a southern wind suddenly picks up in which case it might go slack.

The rising tide is usually predicted for the early morning hours, and nighttime tides tend to be less affected by the wind, because there is less wind at night.

The best bet for the jetties (tide wise) is to fish the falling tide rather than the rising, because it is during daylight hours and it is a bit more predictable. If the current in the channel is too strong, go through a cut and fish the outside. If there's not enough water movement outside, fish the inside. If nothing is happening, wait a bit, it will change. Better to wait than move. There is almost always a spot in the afternoons where the fish will turn on, the trick is reading the currents and finding it.

Thanks