Originally Posted by beeradley
yikes...lol. This has been super helpful...rookie question here: What is a "Ground Swell" and how do we know if one will be in effect the night we anchor?

Large waves from the north due to storms in the North Atlantic. They generally occur only in the winter.

There are web sites that forecast wind and waves, for example http://www.windguru.cz/int/index.php?sc=58

Dan cheers