One conditions number can't describe every fishing spot
Gulf surf, a shallow Laguna Madre flat, the pass, and offshore water respond differently. Check when and where each forecast was issued. The NWS beach and marine products, NOAA tide prediction, lightning risk, and instructions at the access each answer a different question.
Think about the way back too
Wind can push Laguna Madre water levels away from the astronomical tide prediction. Storms can change any of these settings quickly. Read the forecast with your group's experience and return route in mind, and change or stop the outing when the conditions no longer suit it.
Use the NWS Brownsville Beachcast for Gulf beach and jetty conditions. Open island conditions and source links for marine and tide products, then compare the places and methods that make sense for the day.