Europe has several seas with international waters which are sheltered from the big oceans. They have significantly smaller waves than off the U.S. coast and this may mean that Ephemerisle can venture into free waters quicker if arranged in Europe rather than in the U.S.
Possible seas include the Mediterranean Sea, the Baltic Sea, the Black Sea, the Caspian Sea etc.
Patri is very interested in doing the second Ephemerisle in Europe, sometime next year (2010).
Wave data for the Baltic Sea
One promising location seems to be near the Northern Baltic Proper buoy. It's close to three capital cities, Stockholm, Helsinki and Tallinn with a combined urban population of about 4 mio., and the wave height looks to stay below 3 meters in the summer months.
Another Google Maps layer indicate buoys in the Danish seas. Lasse Birk Olesen only have the data in a book, but none of the scales ever indicate waves higher than 6 meters and most of them never gets above 3-4 meters. This data is pretty old though, collected between 1930 and 1960, but where the buoys overlap with the HELCOM ones, they show to still have waves within the same range. If you want to use this data, contact Lasse and he can scan it in.
Possible European Partners: