Apple Watch SE contains a h2o resistance ranking of fifty meters less than ISO typical 22810:2010. Which means that it might be useful for shallow-water things to do like swimming in a pool or ocean. Apple Watch SE shouldn't be useful for scuba diving, waterskiing, or other things to do https://www.jowissa.com/de-na/products/facet-brilliant-swiss-ladies-watch-j5-844-m