Conditions will also be wintry across Cork today.
It covers all of Connacht, Donegal, Monaghan, Cavan, and all Leinster counties - except Wexford and Kilkenny - and is in place until 6 this evening.
The Coast Guard is warning people to stay away from the water as wet and windy conditions are expected.
A swimmer was rescued at Sandycove in Dublin yesterday morning, while a windsurfer was rescued off Garrylucas Strand in west Cork.
Irish Coast Guard spokesman Ger O'Flynn says conditions are treacherous:
