By way of Castlevania Netflix series writer Warren Ellis, close to the one-year anniversary of the original season’s release, he let fans know that Season Two will launch on October 26, 2018 via Twitter:

Netflix opted for a four-episode run in 2017 that left the series on a cliffhanger. Fans can now expect the cliffhanger to be resolved in late October with the release of Castlevania Season Two. Warren Ellis had originally claimed in a since deleted tweet that the series would be coming out in Summer 2018. 

Castlevania Season Two will be available exclusively on Netflix beginning October 26, 2018. You can expect all eight episodes to be released on that day, making for quite the binge-fest for fans.

Source: Twitter