It’s almost now 3 years, since (August, 2014) Google announced that HTTPS is a ranking signal. Now 3 years later. Although only less than 1% of all websites are secure ( talk about getting ahead of the competition! ), 40% of Google’s page one organic search results feature an HTTPS sites.
Google has encouraged webmasters to make the migration to a secure site for a while now and is been giving an increasing amount of weight in ranking boosts to websites that are HTTPS.