It’s officially time to fill up the paddling pool.

A heatwave is set to grip Ireland this week, with temperatures expected to climb well into the high twenties and potentially reach 30°C by Thursday.

Met Éireann has issued a High Temperature Advisory for the entire country, warning that “exceptionally warm weather will occur over Ireland this week.”

According to the national forecaster, daytime temperatures will regularly exceed 25°C over the coming days, with Thursday shaping up to be the hottest day of the week.

The warm spell won’t just be noticeable during the day. Forecasters are also predicting unusually mild and humid nights, with temperatures remaining above 15°C in many areas.

⚠️ Yellow High Temperature Warning issued for Ireland ⚠️

Potential impacts 🌡️
• Water safety issues due to increased use of lakes/beaches
• Uncomfortable sleeping conditions
• Heat stress

Valid: 1200 Tue 23/06/26 to 0900 Fri 26/06/26

Details ➡️ https://t.co/GYji547FKt pic.twitter.com/WMq4w8dJvn

— Met Éireann (@MetEireann) June 22, 2026

While many people will be making the most of the sunshine at beaches, rivers and lakes, Met Éireann has warned that the hot weather could bring increased water safety risks. Heat stress and uncomfortable sleeping conditions are also listed among the potential impacts.

There is also a chance of thunderstorms developing later in the week, particularly on Thursday, which could bring a dramatic end to some of the hottest conditions.

The advisory remains in place until 9am on Friday, June 26th.

In other words: enjoy it while it lasts.