Gulf of Mexico Diving From Houston: Reefs, Rigs and Wetsuit Thickness
Aiar Ghelber Sep 25, 2026
Scuba diving from Houston means you have more options than most people expect. You can train in a local lake, dive a reefed oil platform in the Gulf of Mexico, or head offshore to the coral reefs of Flower Garden Banks National Marine Sanctuary. Every one of these Texas dive sites has a different water temperature, so choosing the right wetsuit thickness matters. This guide covers Gulf of Mexico diving from Houston and how to match your exposure protection to the season.
Flower Garden Banks: Coral Reefs Off the Texas Coast
Flower Garden Banks National Marine Sanctuary protects 17 banks in the northwestern Gulf of Mexico, spread across 145 miles off the Texas and Louisiana coasts. According to NOAA, the banks sit roughly 80 to 125 miles offshore, so you need a boat to get there. Seven banks have reef inside the 130-foot recreational limit: Stetson, West Flower Garden, East Flower Garden, Bright, Geyer, McGrail and Sonnier. The shallowest reef sits about 56 feet down at Stetson Bank and West Flower Garden Bank, and the reef cap generally begins at 55 to 60 feet.
At East and West Flower Garden Banks, NOAA reports that as much as 52 percent of the bottom is covered in live coral. You may see barracuda, groupers, parrotfish and spotted moray eels on a typical dive, and larger visitors such as manta rays, sea turtles and whale sharks are possible. Stetson Bank looks very different. It has sand flats, sponges, algae and rocky ridges pushed up by salt dome formation. It also has a pinnacle covered in Madracis coral where large schools of creolefish gather.
Plan carefully. NOAA describes the Flower Garden and Stetson Banks as intermediate to advanced dive sites, with currents that can change speed and direction during a dive. The sanctuary strongly recommends previous saltwater experience and a recent refresh of your dive skills. Anchoring is not allowed, so boats 100 feet or shorter tie up to sanctuary mooring buoys. Spearfishing is prohibited, but no dive permit is required.
Texas Oil Rig and Platform Diving
The Texas Parks and Wildlife Department Artificial Reef Program has turned more than 140 decommissioned petroleum platforms into marine habitat through its Rigs-to-Reefs work. TPWD lists nine reef sites located no more than nine nautical miles from shore, and nearly 200 marine fish species have been seen on Texas artificial reefs. TPWD scientific divers see red snapper on about four of every ten visits to its reef sites.
One well-known example sits inside the sanctuary itself. The HI-A-389-A platform stands about a mile from the East Flower Garden Bank reef cap. In 2018 its deck and upper section were removed to a minimum depth of 65 feet below the surface, and the rest was left in place as an artificial reef. The structure is covered in sponges, hydroids and oysters that attract abundant fish life. Deeper rig dives like this are a good reason to take your Advanced Open Water course in Houston, which certifies you to dive to 100 feet with a buddy and includes five specialty dives.
Lake Training Near Houston
Most Houston divers start close to home. In our PADI and SSI Open Water certification course, pool training takes place at a private local pool and the four open water dives take place at a local lake. Lake dives are a relaxed place to practice buoyancy control before you try Gulf currents. If you plan to make several boat dives in one day offshore, the Enriched Air Nitrox course teaches you to use nitrox to extend bottom time on repetitive dives.
Gulf of Mexico Water Temperatures by Season
Offshore water at the sanctuary is warm for much of the year but does change with the seasons. NOAA monitoring summarized in the sanctuary climate vulnerability assessment shows average sea surface temperatures of about 69F in February and about 86°F in August, with a range of roughly 64°F to 88°F recorded between 1985 and 2001.
Closer to shore the swing is bigger. NOAA coastal water temperature averages for the Galveston Bay entrance range from about 56°F in January to about 87°F in August. TPWD also notes that Texas Gulf waters can drop to 60°F in winter.
Choosing the Right Wetsuit Thickness for Gulf Diving
Comfort is personal, so treat these as starting points and go thicker if you run cold.
- Summer offshore, mid-80s °F: many divers are comfortable in a 1mm to 3mm full suit or a shorty. A full suit also covers more skin against scrapes and stings.
- Spring and fall, 70s °F: a 3mm full suit is a common choice. Add a hooded vest if you get chilled on repeat dives.
- Winter Gulf water, 50s and 60s °F: a 5mm full suit, often with a hood or 5/3mm hooded vest, keeps most divers warmer.
Our wetsuits for sale in Houston include 1mm to 5mm full suits, shorties, jumpsuits and hooded vests for men and women. Fit matters as much as thickness, because a snug wetsuit keeps you warmer than a loose, thicker one.
Get Ready for Your Next Gulf Dive
Whether you are new to scuba or planning a trip offshore, start with the right training and the right exposure protection. You can also browse our upcoming scuba diving trips. Questions about courses or wetsuit sizing? Contact Gulf Coast Scuba, call (713) 888-0006, or visit us at 3206 Mercer St, Houston, TX 77027.
