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 FRIDAY 28 MARCH 2025
Week 1 (Monday 31 March to Sunday 06 April)
High Pressure looks set to be the dominant feature of the weather over Ireland for the first week in April bringing mostly dry and settled conditions. Temperatures are forecast to be well above the climatological average. It will be significantly drier than normal with rainfall totals forecast to be well below average for early April.
Week 2 (Monday 07 April to Sunday 13 April)
High Pressure is likely to continue to be situated near Ireland at Forecast Week 2 bringing predominantly settled weather conditions. Rainfall amounts are forecast to be below normal whilst mean air temperatures are predicted to be above the climatological average for mid-April.
Week 3 (Monday 14 April to Sunday 20 April)
Weather conditions look set to turn more changeable at Forecast Week 3 as Low Pressure systems move closer to Ireland. Mean air temperatures are likely to be around the climatological average. It is likely to be wetter than normal with showers and longer periods of rain moving through at times.
Week 4 (Monday 21 April to Sunday 27 April)
Forecast confidence is lower at Forecast Week 4 and towards the end of the month of April. At present, there is a signal for Low Pressure to be situated to the south of Ireland with rather mixed weather conditions over the country. Temperatures and rainfall totals are likely to be around the seasonal average.
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.