A yellow weather warning issued by Mét Eireann remains in place in parts of the country with high levels of rain expected over the weekend.
The weather warning, which came into operation on Friday evening, covers counties Offaly, Limerick, Tipperary, Galway, Mayo, Clare and Kerry.
Mét Eireann said that rain will be widespread on Saturday with heavy showers in some counties.
However, it said the heavy rain will ease off on Saturday evening ahead of the Ireland vs South Africa game.
The Road Safety Authority has warned motorists to beware of mudslides and flooding on roads during the yellow weather warning.
Pedestrians and cyclists have been urged to wear reflective clothing and to use footpaths, or to walk in the direction of traffic where none are available.
Weekend weather:
Sunday looks set to be a mostly dry and bright day, with sunny spells, but a few scattered showers will occur near north and northeast coasts. It will feel cold with maximum temperatures of just 8 to 10 degrees.
Sunday night will be very cold with widespread ground frost and temperatures falling to minus 3 degrees.
Monday looks set to be cold with frost and fog for the early part of the morning.
The Road Safety Authority has issued the following advice on driving in heavy rain:
• Allow for extra stopping distance on wet roads
• Be cognisant of additional spray from HGVs
• Allow reasonable clearance for cyclists and motorcyclists
• Be aware of the danger of aquaplaning on roads with higher speed limits
• Check tyres and replace them if the thread depth is below 3mm
• Use dipped headlights where visibility is poor
Ireland vs South Africa:
Fans will be hoping that the rain holds off as Ireland take on South Africa at the Aviva Stadium at 5:30pm on Saturday evening.
Fans are being encouraged to arrive early as traffic is expected to be heavy in the area.