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
MONTHLY FORECAST, ISSUED TUESDAY 01 APRIL 2025
Week 1 (Monday 07 April to Sunday 13 April)
High pressure looks set to continue to dominate the weather over Ireland for week 1, the second week of April, bringing largely dry and settled conditions. It’s expected to be milder than the climatological normal, with the highest temperatures forecast in western areas.
Week 2 (Monday 14 April to Sunday 20 April)
The weather is likely to start to become a little more changeable and unsettled into week 2, with low pressure to the southeast starting to influence conditions. It’ll be a little wetter than normal in the east, but it’ll continue drier than normal further west. Temperatures will drop and will be closer to average.
Week 3 (Monday 21 April to Sunday 27 April)
Indications are that high pressure will become dominant again into week 3, bringing more settled conditions. It’s likely to be drier and a little milder than average.
Week 4 (Monday 28 April to Sunday 04 May)
While confidence in the forecast is lower at week 4, there is a signal that high pressure will continue to influence the weather over Ireland, bringing drier and milder than average conditions.
SEASONAL OUTLOOK FOR April May June (AMJ)
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 below average overall.
Mean temperatures during AMJ are signalled to be above average overall. Temperatures are likely to trend between 0.5 and 1.0°C above average over the three-month period.
The rainfall forecast is less certain, though there is the potential for drier spells, especially in April. There is also the slight chance of wetter than average conditions developing for May.
The sea surface temperatures around Irish coasts are expected to be above average during AMJ, trending 0.5 to 1.0°C degrees higher than normal.