Temperatures could hit up to 20° over the bank holiday weekend.
However Met Éireann says Saturday will be quite showery across the country.
Overall there will be a good deal of dry weather for the rest of the weekend.
Saturday will be mostly cloudy and misty at first, with scattered outbreaks of light rain and drizzle.
It will brighten up during the day with some sunny spells developing, but scattered showers also, mainly in the east.
Some of the showers will turn heavy in the north later, with a slight risk of an isolated thunderstorm.
Sunday will be mostly dry, with a mix of cloud and sunny spells, but there could be a few isolated showers in the east or southeast.
Bank holiday Monday will see most areas will be dry, with bright or sunny spells.
But Atlantic coasts will be cloudier, with a chance of a few patches of light rain or drizzle.
Rain will also become more widespread along west and northwest coasts overnight.
— Met Éireann (@MetEireann) June 4, 2021
Head of forecasting at Met Éireann, Evelyn Cusack, told Newstalk Breakfast the weather is likely to be better next week.
"It looks very good more next week - quite good for the weekend."
But she joked with host Ciara Kelly: "When you say 'sizzling 20' you really are pushing it there."
"The next two months now the sun is at its strongest over Ireland - that means you will get sunburn, so please don't get sunburn.
"It's actually quite fresh out there now, and it's raining in the west and north-west.
"Tomorrow will be quite showery - but there will be sunshine, the sunny spells that we get in Ireland: the sun suddenly comes out and it gets really hot, and then the cloud comes and it gets cold.
"So it's that kind of day tomorrow".
Looking ahead to the rest of June, she said we could be looking at a good month.
"It does look like June could be shaping up to be mainly dry.
"But for the next 10 days, for next week, definitely getting warmer.
"Last week we got temperatures up to 23... so we could get 23, 24, 25 - so next weekend actually will be warmer than this weekend".