There are mornings when the forest behind the house disappears entirely, and then returns tree by tree as the sun climbs. I have photographed those mornings for ten years, and I am still learning to read them.
Radiation fog forms on clear, still nights when the ground cools quickly. It lies low and lifts in the morning: be outside before sunrise.
Valley fog pools in the low ground and leaves the hilltops clear. Climb above it and you will see the forest floating.
Sea fog rolls in from the water on warm days. It is the most theatrical and the least predictable.