Source : Webster's Revised Unabridged Dictionary (1913)

Boisterousness \Bois"ter*ous*ness\, n.
   The state or quality of being boisterous; turbulence;
   disorder; tumultuousness.

Source : WordNet®

boisterousness
     n 1: a turbulent and stormy state of the sea
     2: the property of being noisy and lively and unrestrained