The extended range forecast, which includes the monthly and seasonal forecasts, can at times provide an insight into weather patterns in the months ahead. However, they should not be used for specific planning purposes as they have generally low skill compared with the 10-day forecast. This is because forecasts beyond one week become increasingly uncertain due to the chaotic nature of the atmosphere. Further information can be found here: Monthly and seasonal forecast explained.
Images: Shutterstock/gabriel12. Met Éireann HQ during Storm Emma 2018
Issued: Tuesday 7th April 2026
Week 1 – Monday 13th April to Sunday 19th April
It looks set to be a mixed and changeable week with some weak areas of Low Pressure in the vicinity of Ireland. Temperatures are likely to be close to the April average. Rainfall amounts are forecast to be slightly above normal, perhaps closer to normal in parts of the north.
Week 2 – Monday 20th April to Sunday 26th April
There remains a signal for some slack areas of Low Pressure to be positioned near Ireland towards the latter part of April, bringing showery weather conditions. Rainfall totals are likely to trend above normal with the chance of heavy showers and perhaps some thunderstorms. Temperatures are currently forecast to be close to the climatological average.
Week 3 – Monday 27th April to Sunday 03rd May
There are tentative signs of more settled weather conditions developing at the end of April and into the beginning of May. Rainfall totals are likely to be near-normal, whilst mean air temperatures are forecast to be above normal.
Week 4 – Monday 04th May to Sunday 10th May
There are weak signals for High Pressure being the more dominant feature of Ireland’s weather through early May, bringing fairly settled weather. Rainfall totals are forecast to be below normal. Temperatures are likely to be near or perhaps slightly above the climatological average.
Seasonal Outlook for April, May, and June (AMJ) forecast
The signal from the C3S seasonal models for Ireland during the AMJ period is for above average temperatures. Rainfall amounts are less certain with the possibility of precipitation trending near average overall.
Mean temperatures during AMJ are signalled to be above average overall. Temperatures are likely to trend between 0.2 and 1.0°C above average generally. The potential for warmer than average temperatures increases through the period.
The rainfall forecast is less certain with no clear signal for above or below average rainfall overall. There is potential for both wetter and drier spells within the three months.
The sea surface temperatures around Irish coasts and over the Atlantic are expected to be above average during AMJ, trending 0.2 to 1.0°C degrees higher than normal generally. Sea surface temperatures are expected to be highest in comparison to average away from northwest coasts.