The pace of retail bankruptcies and store closures in the U.S. has accelerated so far this year compared with 2018, due in part to last year’s lackluster holiday shopping season, a new report finds.

More retail bankruptcy filings are expected in the second half of the year, and bricks-and-mortar stores will continue to close at a higher rate, according to a report released Wednesday by professional services firm BDO USA LLP.

“We’re...