Over the 4th of July weekend we managed to sail every day. Sunday the sea was foggy just off shore. Cold water combined with warm humid air off the land makes it foggy just over the water. A few hundred yards off shore you could only see a few hundred feet. It would change some times we could sail out to some of the outer channel markers but then it would thicken up and we would head back up the river a bit. If we went up river past the adjacent beach it was clear and sunny. So we stayed close to the opening of the Saco river that is bounded by two long jetties and just sailed up and down along the jetties in kind of a holding pattern because it was easy to keep them in sight. After a few hours the fog thinned out and the visibility went out a few miles so we left the channel and went north past a small island and went in toward the beach just north of the jetty and sailed parallel to the beach for a bout a quarter mile them turned out toward another small island just north of the island just outside of the jetty. The whole time we were able to keep a visual baring on a land mark. When we got to the second little island we saw a small group of seals sunning themselves on a little rock just off the island so we drifted over and got a few pictures.