Met Éireann Issues High Temperature Warning and Advisory Nationwide

Met Éireann has issued a High Temperature Advisory and a Yellow High Temperature Warning covering all 26 counties, as an extended period of exceptionally warm weather is forecast across Ireland.

The advisory, issued at 10:45 on Monday, 22 June 2026, takes effect from 12:00 on Monday, 22 June 2026 and runs until 10:00 on Thursday, 25 June 2026. The Yellow High Temperature Warning, issued at 09:30 on Monday, 22 June 2026, takes effect from 12:00 on Tuesday, 23 June 2026 and expires at 09:00 on Friday, 26 June 2026.

Met Éireann advises that daytime temperatures will exceed 25 degrees, with temperatures possibly reaching 30 degrees on Thursday. Night-time conditions are forecast to be very mild, humid and possibly uncomfortable, with temperatures generally staying above 15 degrees. Thunderstorms are also possible, particularly on Thursday.

The Yellow Warning separately forecasts maximum temperatures in excess of 27°C, combined with night-time minima in excess of 15°C.

The public is advised to check the met.ie website and app for updates to forecasts and warnings in the coming days.

Potential impacts across both alerts include water safety issues due to increased use of lakes and beaches, uncomfortable sleeping conditions, and heat stress.

Both alerts cover Carlow, Cavan, Clare, Cork, Donegal, Dublin, Galway, Kerry, Kildare, Kilkenny, Leitrim, Laois, Limerick, Longford, Louth, Mayo, Meath, Monaghan, Offaly, Roscommon, Sligo, Tipperary, Waterford, Westmeath, Wexford, and Wicklow.