Air drying with curls

After I go swimming in a chlorine pool, I do a quick rinse and then go home to wash it out because I live so close by. BUT while my hair dries a little on the way home or if I am a little slow to hop in the shower they dry in such beautiful light wave/curls??? This usually happens when I vacation in warmer climates too, but I attribute that to the humidity and my hair enjoying the extra moisture. Like my hair after the beach is perfect.

However, when I do my shower routine - it is kind of birds nesty, frizzy, and poofy unless I really do a whole hair routine after with leave in, mousse and oil - but even then it’s not as pretty and light because it has product. I’m confused because the pool or beaches - I come using no product and my curls hold and look so much better.

Also I would say that I have 2B waves, and high porosity hair.