That seals rest on the shore? It is a normal thing for them to do, and there is generally nothing wrong with them. You should not disturb them, try to get them back into the water, or splash water on them. (How would you feel is someone did that to you while you were trying to take a nap.)
This seal was resting on Little Lighthouse Beach, although he did get disturbed on a few occasions because he was right in the path where people normally walk to go to the Lighthouse, and he kind of blended into the background. He growled at one young girl who never saw him and nearly stepped on him.