Passengers arriving from Italy and the Canary Island of La Palma will have to isolate when they get to Jersey from Sunday.
The countries are being upgraded from green to amber on the government's Safe Travel list.
That requires two coronavirus tests taken five days apart, and quarantine until a second negative result.
Germany, Slovenia and Turkey could also change to amber in the coming days because of rising Covid-19 cases.
"At present, Germany, Slovenia and Turkey are in the green category of the countries risk assessment, however, the number of cases is continuing to rise. If this trend continues, it is likely that they will be re-categorised in the next few days." - Government of Jersey.
The latest classification of countries can be found at gov.je/coronavirus.
Assistant Health Minister seeks change to Assisted Dying Law
'Unfair' apprenticeship funding under review
Hotel raises £3k for public defibrillator on Gorey Pier
Petition calls for regulation of property management firms
Police investigating report of indecent exposure at Bel Royal
New Year's Eve evacuation near Howard Davis Park due to gas leak
Plans submitted for Millbrook Park extension
Five Jersey residents on New Year Honours List
