[NautiNurse]

Not sure your SST map is accurate for current data. Port Aransas reports 89.1ºF, Port Mansfield 88.7ºF, and Rockport 89.4ºF. Plenty warm.

NCEI Coastal Water Temperatures

[SanchoP]

Rockport and Port Mansfield are bay temps and Port A is at the Coast Guard station inside the jetties. Here's a map from the 22nd (as recent as I could find.)