According to police, the aim of the increased countrywide patrols during the beginning of August is to curb substance abuse, accidents and vandalism.
Police will focus their efforts on city centres, playgrounds and school yards where young people often gather to celebrate.
Total consumption of alcoholic beverages in Finland has continued to fall, according to Statistics Finland.
In 2015, the total consumption of alcoholic beverages equalled 10.8 litres of pure alcohol consumed per person aged 15 years or older.
By law, the sale of alcohol to those under 18 years of age is prohibited. People over 18 can buy alcoholic drinks such as wines and beers, which contain up to 22 percent alcohol by volume. The age limit for hard liquor is 20.
However, according to a 2015 report by the Organisation for Economic Co-operation and Development (OECD), under-age drinking increased in Finland between the years 2001 and 2010.
In 2010, 41 percent of under-15 girls said they had used alcohol, while nine years earlier the percentage was 23 percent. For boys, the percentage had grown from 30 to 43 percent.