Met Éireann has extended its yellow rainfall warning until 3am on Saturday morning.
It is forecasting heavy showers or longer spells of rain developing widely today, with embedded thunderstorms and localised spot flooding.
It will be humid, with top temperatures of 18° to 21° generally, but 16° or 17° degrees in the north and northwest.
It will become blustery along western and southern coasts.
Rain will become prolonged in parts on Friday night, especially in the midlands and north, with spot flooding likely, but becoming drier and clearer from the west overnight.
Saturday looks to be bright, with sunny spells and some scattered showers. The highest temperatures will be 16°C to 21°C.
Rain will develop in western parts, with breezy conditions.
Sunday will be a breezy day, with outbreaks of rain, possibly turning heavy in the west and north, with the best chance of dry and bright weather in the east.
Rain will affect many areas during Sunday night.
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