The UK Government is expected to review its safe list of countries this week.
Mr Johnson said: “I don’t want to advise people about their individual holidays, individual decisions, they should look at the travel advice from the Foreign Office clearly.
“But what I will say, and I hope people would expect us to do this, in the context of a global pandemic, we’ve got to keep looking at the data in all the countries to which British people want to travel.
“Where it is necessary to impose restrictions or to impose a quarantine system, we will not hesitate to do so.
“It’s been a huge effort for the entire population of this country to get the disease down to the levels that we are currently seeing, but we do not want reinfection and that’s why we’ve got to keep a very, very close eye on the data in destinations around the world.”