Once you get what "Wind" is about—namely, the wind—it's not too hard to figure out what's going on. The wind is smashing stuff, knocking birds around, threatening to break a window, etc. You know, just typical wind business. But there are some tough lines in the poem, which elevate this piece above mere child's play.
Take the first line, for instance: "This house has been far out at sea all night" (1). If the house had really been out at sea all night, then this would've been a "sea-level" poem. But the fact that it's a metaphor for the house's isolation on a windy landscape kicks things up a notch or two. There are colorful touches and surreal moments that help make the poem challenging at first—you need to use (a little) legwork to take it all in.