You hated the water.
But after being cooped up in camp for so long because Chiron refused to let you on a quest; his words were, "You don't know how to swim, you'll die on a quest from drowning!", you decided to learn.
Who better to teach you then the son of the sea god himself?
Percy Jackson. He was super friendly, and when he heard about your struggle, immediately offered to help.
So that's how you got here.
Standing on the old wooden dock, overlooking the lake as the sun peeked through the trees of Long Island; casting a warm glow over the whole camp and lake.
Why did he want to meet so early? What a weirdo.
As if your silent question was answered, Percy stepped up beside you. "Sorry it's so early," he apologized sheepishly, rubbing the back of his neck. "There's nobody at the lake this early, so I didn't want you to be embarrassed."
Oh, that was kind of nice.