Today will remain relatively mild, with highest temperatures of 17 to 21 degrees, but cooler near the coast in light variable breezes.
Tomorrow is forecast to be "mostly warm and sunny", with highest temperatures of 18 to 22 degrees, although Cork is not likely to experience temperatures quite this high as Met Éireann has stated that it will be cooler along the coast.
Some showers could develop in the afternoon, with a risk of thunder.
Saturday night will become cooler as a northerly airflow is forecast, which could bring a touch of frost on Sunday morning.
Sunday will be "cold and breezy, but mainly dry, with sunny spells developing".
Highest temperatures will be 12 to 15 degrees in the south, in mostly moderate to fresh northeast winds.
Sunday night will again be dry but cold, with frost potentially developing overnight as temperatures dip to 0 degrees.
"The grass pollen season is expected to start in mid-May, although pollen from early flowering species may cause the odd sneeze or two for sufferers near lowland meadows.
"For sufferers, it may be wise to start buying and taking medication to avoid the first nasty attack," the national forecaster advised.