Abstract: A new and distinct cultivar of Portulaca plant named ‘WGPORMM25’, characterized by its relatively compact, upright to outwardly spreading and mounding plant habit; vigorous growth habit and rapid growth rate; freely branching habit; dense and bushy appearance; early and freely flowering habit; long flowering period; golden orange-colored flowers with dark red-colored centers that remain open for an extended period of time during the daytime; and excellent container and garden performance.