Weather for the Bank Holiday Weekend - 30 April 2021

A spell of unseasonably wet and windy weather is on the way this Bank Holiday Monday, as an active low-pressure system moves across Ireland.

Ahead of this system which will arrive in the early hours of Monday morning, Saturday and Sunday will see a mix of scattered showers and sunny spells, with temperatures below average for the time of year.  An unstable northerly airmass extends across the country on Friday and Saturday, feeding in cold air and leading to some overnight frosts.  On Saturday, slow-moving, scattered showers will develop through the afternoon and these could turn thundery at times along with the risk of hail.  In between showers there will be good sunny spells with temperatures of 9 to 12 degrees Celsius expected.  Most showers will ease through Saturday night with temperatures dipping under clear spells to around -1 to +3 degrees Celsius, leading to a frost in a few places along with mist patches.

Forecast airmass chart for Saturday 1st May showing the cold northerly airflow over Ireland. Blue colours indicate a cold airmass.

On Sunday a westerly airflow will establish across Ireland along with a slight ridge of high pressure, leading to a good deal of dry weather but still a few scattered showers could pop up in places – though these aren’t expected to be as heavy as Saturday.  Temperatures on Sunday will still be on the cool side around 9 to 13 degrees Celsius, but it could feel quite pleasant in long sunny spells.

Commenting on the transition to more unsettled weather on Bank Holiday Monday, Met Éireann forecaster, Andrew Doran-Sherlock, said: “Later on Sunday night cloud will push in across the country, heralding a change to much more unsettled conditions as a low-pressure system makes its way towards Ireland from the Atlantic.”

“Monday will start wet and blustery across Ireland with unseasonably strong winds developing quite widely, along with the potential for gale or near gale force winds across coastal areas.  There may also be a risk of localised flooding in areas expected to see the heaviest and most persistent rain, particularly across Atlantic and northern counties.”

Andrew continued: “The low-pressure system will clear eastwards away from Ireland later on Monday, with a northerly airflow re-establishing across Ireland. This will keep temperatures below average next week, around 8 to 12 degrees Celsius and it’ll stay on the unsettled side too.”

For the most accurate and up to date 7-day, hourly forecast for your local area on the Island of Ireland go to The latest weather advisories and warnings for Ireland are on the Met Éireann Warnings page. These services and more are available on our free app – available from the App store for iPhone, and Play store for Android. Follow us on Twitter and Facebook for extra weather and climate content.

But whatever the weather please follow the public health advice and help keep everybody safe from COVID-19.