The Met Eireann weather forecast says the weather is set to cool down an become less warm with the increased possibility of rain or showers despite predicted top temperatures of 25 and 26 degrees this week.
Much of the country will be dry on Wednesday with sunny spells, with the best of the sunshine in eastern counties with top temperatures of 20 to 25 degrees.
It will be dry across much of the country overnight with good clear spells in the east. However, thicker cloud is expected across the west of the country and there is the chance of rain developing along the west coast towards dawn on Thursday.
Minimum temperatures will range from 12 to 15 degrees with southerly winds increasing strong to near gale force along the Atlantic seaboard.
On Thursday, Met Eireann says a band of rain accompanied by strong southerly winds will move in from the Atlantic to affect much of west Munster, Connacht and west Ulster.
It looks set to be dry elsewhere with a mix of cloud and hazy sunshine. Maximum temperatures of 17 to 20 degrees in the west but very warm and humid for central and eastern counties with temperatures ranging 24 to 26 degrees.
There will be outbreaks of rain in the eastern half of the country on Thursday night and there may be a few heavy bursts before the rain clears into the Irish Sea around dawn on Friday.
Elsewhere, it will be largely dry with clear spells and just isolated showers. Minimum temperatures of 12 to 16 degrees. Winds will be moderate to fresh southerly in direction.
Showery rain will affect western counties on Friday and will gradually extend eastwards during the course of the day. However, many eastern counties will hold dry until nightfall with decent spells of sunshine here.
Feeling less warm than of late with maximum temperatures of 17 to 20 degrees and moderate to fresh southerly winds. Fresh and blustery overnight with scattered showers, these heaviest and most frequent in Atlantic coastal districts. Minimum temperatures of 8 to 11 degrees in moderate to fresh southwest winds.
Saturday looks set to be a bright, fresh and blustery day with sunny spells and passing showers, the showers may merge into longer spells of rain at times in the west and northwest.
Top temperatures will reach 16 to 20 degrees in fresh to strong southwesterly winds. On Saturday night there is the possibility of a spell of rain spreading up from the south to affect much of the country, possibly giving a few heavy bursts of rain. Minimum temperatures of 11 to 13 degrees.
Rain is expected to clear from the east and northeast early on Sunday leaving a day of sunny spells and isolated showers. Maximum temperatures of 17 to 21 degrees in moderate southerly breezes.
There is the chance of some showery rain moving up from the south on Monday but Tuesday and Wednesday are expected to be largely dry days with good sunny spells. Temperatures will be close to or above the seasonal average.