Depends on how close to the last meal, the time of my last bolus will affect what happens.
.
My target is to be in the high 4s, low 5s in the morning. I use a pump. I do quite frequent checks at night and have used a cgms to see what's going on.
Once my dinner bolus has finished my glucose levels are almost flat for much of the night , just small wiggles up and down with a slight rise towards morning . So basically on a normal day with a bit of exercise I like to go to bed between 4.5 and 6mmol.
If I've had a few days of laziness BG will rise more and is also likely to be higher at bedtime, I'll do a tiny correction if around 7mmol.
If I've done a lot of exercise, especially if this was late afternoon or evening (which often ends up with a later dinner anyway) I have to be far more careful as my levels can fall a lot 5-7 hours after exercise. I prefer to go to bed at above 6mmol but also use a different basal pattern with less insulin per hour.