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: Friday 3rd April 2026
Week 1 – Monday 06th April to Sunday 12th April
For Week 1, indications are for mixed but mostly unsettled conditions with Ireland likely often situated between low pressure to the northwest and high pressure to the east and south. Low pressure will send in spells of wet and windy weather at times, with some thundery falls possible. However with high pressure nearby, there’ll be some drier sunnier interludes too. Overall, rainfall amounts will be higher than average, wettest in the west. While temperatures will fluctuate, it will be milder than average generally, though temperatures will be closer to normal in the west and northwest.
Week 2 – Monday 13th April to Sunday 19th April
Week 2 will bring mixed conditions and while low pressure in the Atlantic will send in spells of rain and possibly windy weather, high pressure to the east and northeast will move closer and start to play a more dominant role over our weather, mostly likely for the second half of the week. It’s still likely to be wetter than average, but it’s likely to be milder than average.
Week 3 – Monday 20th April to Sunday 26th April
During week 3 high pressure to our north will play a dominant role in our weather, bringing more settled conditions generally. There’ll still be some rain or showers around though, with these most likely to affect parts of the south and east. Overall, it’s looking drier than normal for most, driest across the north and west, while there’s a signal for slightly higher than average rainfall for the southeast. While some warm sunshine is likely, clearer skies by night will result in some colder overnight temperatures, so it looks like overall temperatures will come in around average.
Week 4 – Monday 27th April to Sunday 03rd May
During week 4, there’s still a signal for high pressure to the north of Ireland to dominate, but with low pressure to the south starting to influence conditions too, especially further south. Overall rainfall amounts are likely to come in around average to drier than normal for many parts of the country, driest across the north and west. However, it’s likely to be wetter in parts of the south and east, with above average rainfall in some areas, especially in the southeast. It’s likely to be milder than 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.