On coming out into open water, we found the swell forecast had been, far from an exaggeration, rather an understatement. It was good that we weren't motoring, since without a good wind to steady the sails, Ganymede would have rolled gunnel to gunnel in the short-period, steep swell. It seems that as lows brush by the coast, the SW winds offshore generate a fearsome onshore swell, even while it's blowing N or NE in inshore waters. It wasn't too bad at first, sailing along close-hauled, but toward afternoon the wind came up and pointing was no longer a good option. We had gotten far enough from the shelter of the coast that the wind waves, coming against the SW swell, became really uncomfortable, and an inexplicable swell from the east seemed to be running as well, adding it's own flavor to the confusion of the seas.