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 24 OCTOBER 2025
Week 1 (Monday 27 October to Sunday 02 November)
It looks set to be a rather unsettled week with Low Pressure dominating. Mean air temperatures are forecast to be near or slightly above the climatological average. Rainfall totals are predicted to be well above normal for the time of year.
Week 2 (Monday 03 November to Sunday 09 November)
There is a trend towards Low Pressure and unsettled weather conditions during the week. Mean air temperatures are predicted to be slightly above normal. It looks set to be wetter than normal for early November.
Week 3 (Monday 10 November to Sunday 16 November)
There is a weak trend towards settled weather in the middle of November with some High Pressure anomalies forecast over Ireland. Temperatures are forecast to be slightly above the climatological average. Rainfall amounts are likely to be near or slightly below normal for the time of year.
Week 4 (Monday 17 November to Sunday 23 November)
At Forecast Week 4, there is a slight signal for more settled weather than normal for late November. Temperatures are predicted to be around the climatological average, whilst rainfall amounts are forecast to be below normal.
Seasonal Outlook for November, December and January 2025-26 (NDJ)
The signal from the C3S seasonal models for Ireland during the NDJ period is for above average temperatures. Rainfall amounts are less certain with potential for both wetter and drier than average spells within the three months.
Mean temperatures during NDJ are signalled to be above average overall. Temperatures are likely to trend between 0.5 and 1.0°C above average generally. However, colder than average periods, where winter hazards are possible, could still occur at times.
The rainfall forecast is less certain. Generally, there is potential for both wetter and drier than normal conditions through NDJ.
The sea surface temperatures around Irish coasts and over the Atlantic are expected to be above average during NDJ, trending 0.2 to 1.0°C degrees higher than normal generally. Sea surface temperatures are expected to be highest in comparison to normal during December and January.