@maggiemae That day in particular was really super warm, but the next day was cloudy and chilly. Of course, that second day was the day that we had set aside to swim all day (which we did anyway, at least part of it).
@kali66 It was a hilarious beach location. Tons of tourists at the ruins were staring down at the people in the water. To swim there was to have hundreds of people watching at you! It'd be an impossible place to drown.
It's freezing in my part of the world...