And honestly, even 80F in full solstice sunshine is plenty warm enough to swim in regardless of dews. I’m with ya all the way on high dews.... unless your goal is just to go from air conditioned place to air conditioned place. There’s no way the folks that say they love that stuff are opening their windows and doors to enjoy it like one does when it’s Chamber weather.
I get Kev’s reason though for warm evenings, dews definitely help in the overnight if you like sleeping in a hot bedroom.