This morning has begun misty and foggy, with some dense fog in many places. Some of the fog is likely to linger into the early afternoon in central areas. A dry day, with some bright or sunny spells, will develop, with Top temperatures 12 to 15 C., in light variable breezes.
Mist and fog will return to some places early Friday night and will be dense in places. But cloudy, breezy weather will push in off the Atlantic later and much of the fog should clear. Southwest breezes will increase moderate to fresh. Temperatures as low as 4 or 5 C., in places early on, will rise to between 8 and 11 C., by dawn.
Saturday will be a breezy one, but mostly cloudy, with patches of mist and drizzle in places. This will be mainly on hills and exposed Atlantic coasts. Moderate to fresh southwesterly winds will be strong for a time over parts of Ulster. Top temperatures of between 12 to 15 C.
Saturday will be breezy for a time overnight, but the fresh northwest winds will decrease moderately before dawn. There will be some clear spells, but cloudy periods too, with occasional patches of mist and drizzle - these most likely on exposed coasts. Mild with lowest temperatures 10 to 12 C.
A lot of dry and locally bright weather is expected on Sunday, but it will be a cloudy, misty start in some places, with a few patches of drizzle. This will soon dry out and some sunny spells should develop fairly widely by afternoon. Moderate northwest breezes will decrease light variable. Top temperatures of between 12 to 14 C., generally, but in any decent sunny breaks over Munster and south Leinster, values could hit 15 or 16 C.
It will be chilly for a time overnight, especially over Ulster, where temperatures may fall down to 3 or 4 C, with some grass frost forming locally. But becoming milder in all areas later, as cloudy, misty weather pushes in off the Atlantic. Temperatures should range from 7 to 9 Celsius.