The above link has real time webcams for various saltwater places around the greater Galveston area.
Houston has the bayous where folks sight cast for carp. Lake in the woodlands rents kayaks. I might get out in the salt, but never really know until the morning of.
This board has very few people that fly fish the Houston/Galveston area saltwater and post anything about it. Seems to be much more of an inland freshwater scene with an occasional post about a distant saltwater destination.