Do you mean for a bedtime snack, @A DiabetesTeam Member ? A lot of people seem to opt for a nut butter on a few crackers or tuna. Maybe check the local grocer and read the labels on the protein bars offered in your area. I can eat from several of mine.
Or do you mean your sugars are just high? There are said to be several things that can help lower blood sugar. Water. Blue berries. Cherries. Apple Cider Vinegar. Cinnamon. Chai seeds (I drink Chai tea over the course of the day and it helps my sugars stay down) and the spice turmeric (I have been experimenting with this spice a lot lately. Whether I use a pinch on whatever I am cooking, or just use a pinch mixed in with my salads I do find it lowers my sugars faster after a meal). But first, do some research and read about the stuff I have mentioned here to see if it is right for you. Especially spices may interact with your meds, though cooking with is said to be safe, I would urge you to discuss with your doctor first.

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A Diabete...

I have noticed late night dinners, or snacks, keeps the blood sugars reading high and remains high in the morning, but nothing after 7pm or 8pm, keeps the blood sugar readings at 5.

I was having hi blood sugar levels in the mornings but it's better now working on lowering my blood sugar with diet and meds metformin and Amaryl twice a day I been adding salads and or broccoli and green beans and tomatoes to my diet, almonds and Sunflower seeds

It is natural to raise slightly. However, most of us do not raise slightly. Anything over 6.6 for any length of time is doing damage to our organs. You want to avoid that. Not spend your sleeping hours doing this to yourself.

It's natural for sugars to rise during the nightime