The series is an international co-production between CBBC, ZDF and Netflix The series was made available to stream internationally on Netflix on 22 July 2017. It will be made available to members in the UK, Ireland and Germany after its premiere on CBBC and ZDF. The series premiered on CBBC on 11 January 2017. A second series was confirmed in June 2017 and began airing from 8 January 2018.

Answer this question: when is the second season of the worst witch coming out on netflix? Let's give stream of consciousness first:
The important part for answering this question is: A second series was confirmed in June 2017 and began airing from 8 January 2018.
So, the final answer is 8 January 2018.