Infections have risen sharply over the last month, with doctors telling Polish media that the country is running out of hospital beds, ventilators and medics.
On Friday, Poland saw a record 445 coronavirus-related deaths. On Saturday, the country recorded 349.
The restrictions in force in Poland include shutting most shops in shopping malls, theatres, museums and galleries from Saturday onwards, but the government has insisted it wants to avoid a total lockdown.
Poland has 20,249 occupied hospital beds out of 30,896 available for Covid-19 patients.
Some 1,813 of its 2,357 ventilators are in use, health ministry data showed.
On Friday, the government introduced new economic support measures amounting to 9-10 billion zloty (£1.8bn-£2bn) to help businesses weather the second wave of the pandemic.
