Most departure-time guides start with the sunset arc. I start somewhere more useful for a parent: when will my children still be awake and happy? Because the single biggest timing decision for a family is not which month — it is sunset cruise versus dinner cruise, and the clock decides it.
The sunset cruise boards around 18:30 from Karakoy and has you back on dry land by roughly 21:00. That is a window a 4- or 7-year-old can do cheerfully — they board alert, watch the light change, and are home before they fall apart. The dinner cruise departs at a fixed 20:30 and returns near midnight; that is a 3.5-hour late-evening sit-down that runs straight through most children's bedtimes. Older kids (say 9 and up) can manage it and love the show; toddlers usually cannot.
So before you optimise the month, settle the format against your children's clock. I have watched too many families book the late dinner cruise for the 'full experience' and spend the second half managing an overtired toddler. The rest of this guide gives the exact times — but that first decision is the one that makes or breaks a family evening.

