can i swim with my apple watch

Series 2 and newer, yes, they're rated for swimming in a pool or the sea. The very first one and Series 1 are only splash resistant, so not those. Start a swim workout and it locks the screen for you. Afterwards turn water lock off and it plays a sound to push the water out of the speaker. What wears the seals down is hot tubs, saunas, soap and sunscreen, not the swimming itself. Rinse it in fresh water after the sea, and leave leather or metal bands at home.