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 04 NOVEMBER 2025
Week 1 (Monday 10 November to Sunday 16 November)
Week 1 is indicating a signal for low pressure to the south dominating conditions. Mean air temperatures in week 1 will be mild with temperatures signalled to be slightly above normal in the north and east, with more average temperatures elsewhere. With low pressure dominating, higher than average rainfall is expected for most of the country, with drier conditions in the western half of the country.
Week 2 (Monday 17 November to Sunday 23 November)
Confidence in week 2 is lower, but there is a signal for low pressure to continue bringing unsettled conditions. Mean air temperatures are expected to be average for this time of year with above average rainfall across the country
Week 3 (Monday 24 November to Sunday 30 November)
The signal for low pressure continues into week 3. Mean air temperatures are likely to be higher than average for this time of year. Precipitation amounts are also expected to be higher than average due to the nature of the low pressure.
Week 4 (Monday 01 December to Sunday 07 December)
In week 4 the forecast confidence is low. There is no signal for either high or low pressure to dominate our weather this week. Rainfall amounts are expected to be higher than average for this time of year with mean air temperatures signalling to be above normal, so it is likely that we will see unsettled weather.
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.