Why is there no wetsuit in Nook’s cranny?
You will not find it at Able Sisters. This is likely because you have to unlock Able Sisters’ tailor shop, which would prevent players from accessing swimming and diving until they unlocked the shop.
Do I need a snorkel to swim Animal Crossing?
Although Nintendo sends every Animal Crossing: New Horizons player a snorkeling mask for downloading and installing the update, these are not actually required; they just add to the look. What is required is a wetsuit, which can be purchased via the Nook Shopping App or at Nook’s Cranny.