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 28 OCTOBER 2025
Week 1 (Monday 03 November to Sunday 09 November)
There is a strong signal for low pressure to continue dominating our weather, bringing unsettled and mixed conditions. With rain and showers forecast, precipitation totals are expected to be above climatological norms. Mean air temperatures are forecast to be slightly above average for the time of year.
Week 2 (Monday 10 November to Sunday 16 November)
While there is still a signal for low pressure, it is weaker than for the previous week. Precipitation amounts are again forecast to be above climatological norms, although it is not expected to be as wet as the previous week. Mean air temperatures are again forecast to be slightly above average for the time of year.
Week 3 (Monday 17 November to Sunday 23 November)
There is a signal towards high pressure and more settled conditions. Precipitation amounts are forecast to be below climatological norms. Mean air temperatures are expected to be close to average or slightly above for the time of year.
Week 4 (Monday 24 November to Sunday 30 November)
The signal for higher pressure remains with conditions expected to remain more settled than is normal for late November. Precipitation totals are forecast to be average or slightly below, while mean air temperatures are forecast to be average for the time of year.
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.