Sunsations

This is the only beach store I found that sold rash guards/​swim shirts. I went in multiple stores and they all looked at me funny when I asked if they had rash guards. One store even asked me if I meant playing cards.
I understand there’s no surfing in the Gulf but we want a rash guard to wear under a life jacket for paddle boarding and kayaking.
At least Sunsations sells them. The staff was very helpful and friendly.

Picked this souvenir place because they will custom make your shirt — any decal they have on any plain shirt they have. And they have a ton of each.
BUT, make sure you know ahead of time how much your total cost should be, as the lady may or may not be trying to clear some extra profits by over-​charging. When the lady said my total, it sounded high, but by the time I called it into question, she had already processed the transaction (but I hadn’t signed the receipt). After no small amount of protest on her part that the total was correct, she decided that she had made a mistake by charging us for two mugs instead of one. She was REALLY reluctant to cancel the transaction or do a refund, first encouraging me to just get another mug, and when I wouldn’t do that, offering me any T-​shirt I wanted at no additional cost. Finally, she gave in and processed a refund, and only after I had that receipt, did I sign the one for the original transaction.
She also was a little strange to deal with. For example, she felt it necessary to lightly punch my arm and my son’s arm repeatedly; she seemed to mean them in fun, but my arm was sore for a few minutes.

Smaller version of other tee shirt places on the island. They have many choices and located close to our condo on the Gulf.
The staff was very friendly and helpful.