Eurogames suitable for playing outside
Travel Editions

There are travel editions of some very good boardgames that are specifically designed to have more durable board states than the standard games. For example...


Settlers of Catan plays 3 or 4
Ingenious plays 2


I've played the Ticket to Ride Card Game on a train - I think you could probably manage it outdoors, if you had a card table or something. A bungee cord strapped across each face of the tabletop could help everyone secure their cards and could be used to secure boards for games that have pieces substantial enough to survive some breezes.

I'm not sure if it's a "Eurogame", but Abalone is an abstract with substantial, heavy pieces. At least, my '80s vintage edition is.

Dice games might be a good choice. Zombie Dice would be a great choice for a quick game outside, especially after a few beers have dulled everyone's strategic minds a bit. But Roll Through the Ages is an excellent game by any standard! I've only played the iPhone implementation, but game state is maintained with pegs, not pieces, so it should naturally be wind-resistant: