I always drink Amber Bock but I cant say if its a summer beer or not. I just enjoy the taste...

Smoothness, deep-dark color and a roasted malt taste that finishes clean are the hallmarks of this distinctive brew.

Brewed using 100-percent malt—including dark-roasted black and caramel malts and all-imported hops—Michelob AmberBock has a unique, rich amber color and smooth, full-bodied taste.

http://www.michelob.com/ExploreAmberBock.aspx