Police in Mallorca, Ibiza and Menorca are set to start dishing out 100 euros (£90) fines for anyone not wearing a mask from next week.
Any British tourists caught breaching the new compulsory mask rules will be slapped with an on-the-spot fine from July 20.
The Balearic government confirmed on Monday that all holidaymakers and local residents will have to adhere to the coronavirus safety measures which are now in force.
Tourist businesses wanted officials to abandon the plan, saying holidaymakers would be put off coming to the islands if they had to wear masks and claiming there have already been major cancellations.
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But the Balearic's health department said it had to go ahead with the order to wear masks but would include a few more exceptions.
Only warnings will be dished out for the first week so people get used to the idea but from next Monday, the fines will begin.
Minister of Health and Consumption, Patricia Gómez said the week's grace was to allow "adaptation and warning".
Fines will be up to 100 euros but could be less depending on the situation.
It is believed there may be some confusion about the rules at first over when and where they should be used.
The regional government says social distancing of one and a half metres will need to be maintained at all times but masks should be worn to stop the spread of any new coronavirus outbreaks.
However, they don't have to be used on the seafront promenade, on the beach itself or at swimming pools.
They can also be taken off when eating or drinking in restaurants but there is a plea, rather than a directive, to wear them once the meal is finished.
Diners won't have to put their mask back on whilst waiting for the courses to arrive.
Other exceptions include when playing sport or out in the countryside.
The government's official order rules that masks with vents in them will not be acceptable as these are not enough protection.
Commerce leaders say whilst they understand the aim is to make the Balearics a safe and attractive destination for tourists, they don't agree with the mask rule and feel it "passes the buck" on to the individual rather than on the government.