Sabine Pass has a very good flounder run from November to around the end of December at Dick Dowling Park. Redfish are pretty common throughout the year on Keith Lake, Sabine Lake and in the ship channel.
Speckled trout are also common in these areas. June, July and August are primetime months for the jetty wall. The key is fishing as close to the wall as you can possibly get without getting hung up.
I use a cork and live mullet with the cork about 2.5 feet above my bait and some BB weights to keep my mullet from swimming to the top of the water when I’m on the jetty wall.