What time do public beaches open here?

I’ve heard public beaches here close, I forget exactly what time but I know they close.

I would like to know how early in the morning they open. I have only been here barely two days and already leaving tomorrow morning. I wanted to go to the beach today but it kept raining so we didn’t go. I wanted to go for an early morning run and end it with a swim at a nearby public beach but I don’t know when they open so maybe it isn’t possible.

So, what time do public beaches open here? If anyone knows just would greatly appreciate it (especially if I see your answer before I go to sleep) thank you very much in advance