The pilot of the tailwheel-equipped airplane reported that, during landing on a grass runway, a wind gust pushed the airplane off the runway to the left. The right wing impacted a tree and the airplane spun clockwise 180° before coming to rest.

The airplane sustained substantial damage to the fuselage.

The pilot reported that there were no preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation.

The pilot reported that the wind was from 360° at 15 to 20 knots, gusting to greater than 20 knots. The airplane landed on runway 31.