Swim beaches and swim clubs in Waikiki?

Hello from Santa Monica.I'm an open water swimmer (nothing fast or long just like to go a mile or two. Wondering if there are any places I would likely find swimmers (example tower 26 in SM is where a lot of swimmers head out ). Also if I'm going to be solo which beaches would have some life guard coverage around this time of year? (I've never been to Waikiki and I've checked the jellyfish calendar so should be able to go in every day--)