Don't know where you are live.
In some places I'm aware of go for a swim when the sea is ebbing to low tide and you'll never be seen alive again..., no matter how strong a swimmer you are.
Growing up I lived by the sea and yes, you don't fuck around in the sea.
Where I lived it wasn't uncommon for people to die trying to swim when and where they shouldn't. I even lost a crush in high school to the sea (Jealous mermaids grr)
Sometimes being a skilled swimmer is not enough, you need to observe and understand the sea.
Wait for the occasion and it will be easy to get swallowed by it. Otherwise you can be under influence of drugs/alcohol and just go for it.
I think if your instincts kick in it can be very agonizing, but nowadays I envy a lot those who get to catch the boat :)