4 Things to Know About Reapplying Sunscreen in Water

Reapply sunscreen every 80 minutes when swimming or sweating. That is the standard for any sunscreen labeled “water-resistant.” If it says “very water-resistant,” you still get 80 minutes. Some only claim 40—check the bottle.

Water and sweat rinse sunscreen off faster than you think. Even the best formulas break down. You cannot feel when it is gone. By the time your skin turns pink, it is too late.

Set a timer on your phone to remind you. Reapply after 80 minutes in the water or after heavy sweating. Do not trust “once and done”—that is how you get a sunburn.

Your future self will thank you for not skipping reapplication. A single application is not enough for a full day outdoors. Consistent reapplication prevents painful burns and long-term skin damage.