It will end at 10am tomorrow.
A fog warning has been issued for 11 counties, including Kildare.
The status yellow alert will come into effect at 5am for all of Leinster - with the exception of Carlow, Kilkenny and Wexford.
It's due to expire at 10am.
Road-users are warned to take extra, with pockets of dense fog expected.

Kfm Obituary Notices (Tues, March 17th)
DART To Be Extended to Kilcock
Over 3,000 Motorists Caught Speeding Since Thursday, Including Drivers In Kildare
New TII Report Confirms Congestion Is The Main Factor Influencing Risk Of Collisions On M7/M9 Merge
Newbridge Saraid Hartnett Crowned Ireland's Favourite Child
St Patrick's Day 2026: What's Happening In Kildare This Year
Water Outage Planned For Parts Of Naas From 9pm Wednesday Night