Connacht
Issued at: 17 May 2026 12:00
TODAY - Sunday 17th May
Widespread showers today. Some will be heavy and prolonged, with the chance of hail and isolated thunderstorms, which may lead to localised flooding. Some bright or sunny spells but a good deal of cloud about today. Highest temperatures of 9 to 11 degrees with moderate, occasionally fresh and gusty, west to southwest winds. Winds will be strong at times near windward coasts.
TONIGHT
Showers will die out early tonight. Dry for the rest of the night with a mix of cloud and clear spells. Winds will become light and variable, allowing patches of mist and fog to form. Cool with temperatures dipping to between 2 and 4 degrees.
Pollen Forecast
Moderate on Sunday and low on Monday.
Solar UV Index
Low to moderate on Sunday and on Monday.
TOMORROW - Monday 18th May
A dry start on Monday, with any mist and fog clearing during the morning. Some bright or sunny spells but cloud will gradually increase, bringing outbreaks of rain from the southwest in the afternoon. The rain will turn heavy and persistent in places. Milder than today with top temperatures of 11 to 14 degrees. Light variable winds will become southeast ahead of the rain and increase moderate to fresh and gusty, with strong winds developing near the west coast towards evening.
National Outlook
Overview: Continuing unsettled with rain or showers but gradually becoming milder in a southwesterly airflow.
Monday night: Wet with widespread outbreaks of rain gradually clearing northeastwards. Scattered showers will follow from the southwest, turning heavy at times. Milder than previous nights with temperatures not falling below 8 to 11 degrees in a light to moderate southerly breeze.
Tuesday: Cloudy for most with widespread showers turning heavy and persistent at times. Breezy too with a moderate, occasionally fresh, southwest wind, and highest temperatures of 11 to 15 degrees.
Tuesday night: Continuing cloudy for most with showery outbreaks of rain. Lowest temperatures of 8 to 11 degrees in light to moderate southwesterly breezes.
Wednesday: A mix of sunny spells and scattered light showers at first. Turning cloudier from the southwest through the day as showers ease. Highest temperatures of 13 to 17 degrees in moderate, occasionally fresh southwesterly winds.
Thursday: A dull day for most with scattered outbreaks of rain and drizzle. Some mist and hill fog forming too. Highest temperatures of 14 to 18 or 19 degrees in mostly moderate southerly winds.
Further outlook: There is uncertainty in the details but further rain and showers are likely on Friday.
Temperature circle (°C): maximum and minimum temperature forecast for each day. Wind symbol (km/h): arrow points in the direction the wind is blowing. The weather and wind icons: for the time of maximum temperature and minimum temperature.