But elevated ocean temperatures could still lead to more intense hurricanes. Average ocean temperatures off the Texas coast in August typically range from about 85 degrees to nearly 89 degrees Fahrenheit. RELATED: Gulf Coast sea level rising at ‘unprecedented’ rate, studies findMasters said sea temperatures are rising due to a combination of manmade climate change and natural weather variation. "So when those winds change in a natural fashion or because of climate change, it affects ocean currents as well." The El Niño weather pattern could also reset temperatures in the Gulf, Masters said.