[stboz]

Gulf of Mexico water temperatures are around 10 degrees warmer, right now, from the average where they should be.

Not at all. Look here. Click on NCODA and select "SST Anomaly." Pretty near average....there ain't no normal...only departures from average.

[diverteach]

I don't care what anybody else says, I teach scuba in the northern gulf and am in the water ALL the time. We keep log books detailing each dive and conditions which includes water temperature.