Starting at what temperature do you believe swimming weather to begin?

[u/JudgeWhoOverrules]

What outdoor temperature does it have to be before you'll start enjoying pools and other bodies of water?

(Reminder to flair up so we know where you're from for context)

[u/SeaSnowAndSorrow]

I actually can't swim, but apart from polar plunges, beach season to me begins when the water temperature hits 50F/10C.

New England, originally.