It's Easy to Clear Your Mask While Diving

Your scuba mask should seal against your face, but don't be surprised if a small amount of water gets in. It shouldn't ruin your dive and is easy to fix while you are underwater. Experienced divers do it all the time.
Just follow these tips: Breathe out through your nose as you tilt your face toward the surface. At the same time, crack the lower skirt of the mask. The water should run out.
Hair can sometimes get into the mask and break the seal. Women should consider pulling their hair back in a pony tail. Men need to keep facial hair trimmed.