And from Sunday, voyages to and from French overseas territories such as Guadelope and Martinique will be banned unless there are compelling reasons for travelling, Castex added during a 17-minute TV broadcast.
France will close its borders to non-European Union countries for all except essential travel starting Sunday.
Later, Grant Shapps, the United Kingdom transport secretary, made clear that this restriction will not apply to the trade as it will continue to run evenly.
Also, to enter the country, travellers from the European Union will have to show their PCR tests' negative reports.
Citing the economic devastation of such measures, Castex said: "Our duty is to put everything in place to avoid a new lockdown, and the coming days will be decisive".
About 3,000 worldwide lorry drivers were forced to spend Christmas Day in their cabs in Kent after the French temporarily closed their border in December.
"I think these restrictions are going to last a long time".
All arrivals, not just by air and sea, but by land too, must comply with the test rule.
"They will also check on any restaurants which are open illegally and they will break up any parties".
France was bracing for stricter lockdown measures in view of the steadily rising daily infections. "Let's be very vigilant". Many doctors have been urging a new nationwide shutdown like those imposed in several other European countries. The country has reported over 75,000 coronavirus-related deaths. The number of patients hospitalized went up by 142 to 27,308, with the number of those in intensive care increasing by 19 to 3,130.
While non-essential businesses have reopened, restaurants, cafes, bars, cinemas, theatres and sports venues have been closed since October.
Italy, on the other hand, said it would ease coronavirus restrictions across much of the country from tomorrow, despite warnings from health experts that the move was risky given concern over the spread of more contagious variants.
According to the country's health ministry, 1.45 million people have been vaccinated in France so far.