Sheltered place (4)
(Other definitions for nook that I've seen before include "Alcove" , "Corner or small recess" , "Secluded recess" , "Recess offering seclusion" , "Cubbyhole" .)
(Other definitions for lee side that I've seen before include "Area away from wind" , "Region sheltered from the wind" , "Sheltered part (of an island)" , "Needing area of respite" , "Face sheltered from the wind" .)