Met Éireann has issued a Status Yellow Fog Warning for tonight as dense fog is expected to develop over all parts of the country.
The warning is in place from 4pm on Friday until 10am on Saturday.
The national forecaster states that mist and fog during the night will form with some dense pockets of fog developing later.
It will also be a cold night with lowest temperatures of 0 to 3 degrees with some frost risks.
AA Roadwatch is warning motorists to be on alert: “Drive with extra care, using fog lights, but don’t forget to turn them off when they’re no longer needed.”