Some committee and board meetings have a regular schedule, but not all. You can check the Town's online calendar, the Town's meeting bulletin board, to see meetings posted by the week.
If you'd like to know when a particular committee or board will next meet, you can sign up for a meeting alert.
Go to mytowngovernment, click on the committee or board you want to follow, and click on "Subscribe for email alerts for this board." You will be asked to login with your email and a password. When that meeting is next scheduled, you will be sent an email with full meeting information.