I wouldn't necessarily classify these guys as "surf music" in the classic sense, but they're everything about summer to me.
Washed Out:
http://www.myspace.com/thebabeinthewoods
Neon Indian:
http://www.myspace.com/neonindian
Pill Wonder:
http://www.myspace.com/pillwonder
If you don't like those guys, try these guys and make it loud!
Moonhearts:
http://www.myspace.com/charlieandthemoonhearts