Water could have come off the paddle but also from your feet when you entered the boat. I thought I had a leak when I put in a pram that my son built. It turn out to be water from my feet upon getting in the boat. Some also came in from the oars.

> I'd think about drying the boat well, putting it up on sawhorses, and
> carefully pouring a quart of two of water into it. If you don't see a leak
> immediately by observing the outside, try tipping the boat so the water
> runs first to the bow and then to the stern. Another possible point of
> leakage could be the sheer seam, so put the boat up on edge and see if
> anything leaks out. Once you find the leak it shouldn't be that big of a
> job to patch it up.