Cloud will thicken across the north and east and will spread inland.
The cloud will be thick enough during the early hours to produce some light and patchy rain through Shetland and eventually Orkney.
Some mist and fog patches will form in the east.
The clearest skies tonight will be in the west. For some sheltered rural parts, temperatures will fall to around 2C to 4C. Otherwise, around 6C to 9C.