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 10th April 2026
Week 1 – Monday 13th April to Sunday 19th April
Week 1 is indicated to be generally mixed with high pressure to the south and north-east, and low pressure to the west with a predominate southwesterly airflow. Rain and showers will occur at times but there will also be good dry intervals too. Overall, rainfall amounts will generally be above average, though more normal amounts are possible for the east and southeast. Temperatures could be milder above average in the north and east, generally normal elsewhere. In this setup, there is the potential for impactful wind and precipitation.
Week 2 – Monday 20th April to Sunday 26th April
A more settled picture is indicated for Week 2 with high pressure dominating, mainly to the north, generating an easterly airflow. Temperatures will likely be above normal and most places will be drier than normal though some Irish Sea coastal areas may be closer to average. Fog is a potential hazard in this set up.
Week 3 – Monday 27th April to Sunday 03rd May
A weakening high is signalled for Week 3 with low pressure to the south-west generating a predominate southeasterly airflow. Temperatures are indicated to be above average in the south-east, more normal elsewhere. Most places will continue drier than normal but some southern and southeastern coastal areas may have closer to their average amounts. Again, fog is a potential hazard.
Week 4 – Monday 04th May to Sunday 10th May
There is very little confidence in the details for Week 4 with no predominate setup indicated. There is no signal for temperatures to deviate from normal but wetter than average conditions are expected with rainfall the most likely hazard.
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.