A cool, blustery and mostly cloudy start with widespread showers over the north of the country.
Largely dry to begin further south and east with some bright or sunny spells.
Cloud will quickly increase from the southwest with outbreaks of rain arriving on the southwest coast by early afternoon.
This patchy rain will spread to much of Munster through the evening.
Showers becoming more frequent elsewhere, with some turning wintry later over high ground.
Highs of 6 to 8°C. Westerly winds will be strong and gusty, reaching gale force on coasts.
Widespread showers, most frequent in the west, will turn increasingly wintry on Friday night, with some snow accumulating over high ground.
Minimum temperatures generally ranging from zero to plus 3 degrees.
Westerly winds becoming strong with gales on coasts.
Status Yellow - Rainfall warning for South Donegal, Leitrim and parts of Sligo
30 to 50 mm of rain possible.
Warning valid until 8pm.
Status Yellow - Wind warning for Donegal, Galway, Leitrim, Mayo, Sligo, Clare, Cork and Kerry
West to northwest winds will reach mean speeds of 50 to 65 km/hr with gusts of 80 to 110 km/hr.
Winds will be strongest along coasts and on hills and mountains.
Warning valid until 9am.