Weston celebrated Jason Cowburn's 100th game in style.
Charlestown City started four spots lower than Weston on the ladder, but the Blues created the best early chances.
Scott Smith was denied by Tim Pratt, before the visitors tried an audacious long range shot.
But it was the home town Bears who grabbed the winner through Liam Thornton... as Weston moved to third on the NPL ladder.
Catch highlights of the Bears game against Charlestown online at NBN Television by clicking here.