Germany's coronavirus infection rate rose at the weekend despite stricter restrictions and Finance Minister Olaf Scholz has said he does not expect moves to ease curbs before the end of May.

"We need a timetable how to get back to normal life, but it must be a plan that won't have to be revoked after just a few days," Scholz told Bild am Sonntag.

The federal government should be able to outline "clear and courageous opening steps" for the summer by the end of May, allowing restaurants to adjust reopening plans and citizens to plan holidays, he said.