The new rate will be announced before July 1st. I believe there were news announcements of the new rate around mid-November of last year for the January 1st increase.

As /u/Synapse82 said though, make it a habit to check every few months through the EnergizeCT website. I make it a point to check when I'm doing quarterly financial stuff like checking IRA performance, etc. I check electric rates and home heating oil prices so that I have an idea of how things are trending.