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Hydrology Summary Bulletin – November 2025

Hydrology bulletin on rainfall, river flows, lake levels, groundwater levels and spring outflows for November 2025.

November 2025 was a wet month overall. Rainfall was above average in most places, wettest in the
midlands, south and east. Storm Claudia, (named by the Spanish Meteorological Agency (AEMET)),
stalled to the southwest of Ireland between Tuesday 11th and Sunday 16th, steering numerous active
weather fronts and pulses of heavy rain northwards across the country. Friday 14th and Saturday
15th brought intense rainfall, especially to the southeast, and very strong northeasterly winds.

Average river flows for November increased at almost all 132 river monitoring stations assessed,
compared to October 2025. 92% of the monthly average river flows were above the normal long-term range. Lake levels increased at 97% of lake sites monitored with 82% above the long-term
normal range. Groundwater levels increased at all the monitoring sites with 73% above the long-term range. Out of the four spring flows monitored, 1 was in the ‘particularly high’ range, 2 were
‘above normal’ and 1 was classified as ‘normal’.

Monthly Hydrology Bulletin: Edition 066: November 2025

Monthly Hydrology Bulletin: Edition 065: October 2025

About EPA Monthly Hydrology Bulletin: Monthly Hydrology Bulletin – Catchments.ie – Catchments.ie

Access previous EPA monthly Hydrology Bulletins here: Monitoring & Assessment: Freshwater & Marine Publications | Environmental Protection Agency

About author

EPA Catchments Unit

Administrator

The EPA Catchments Unit is based in Dublin, and the team is involved with catchment science, chemistry, ecology, hydromorphology, modelling, Geographic Information Systems and planning. We work with the wider EPA, all of our local authorities, the Local Authority Waters and Communities Office, the Department of Housing, Planning and Local Government, and other public bodies and Departments to ensure we have the best available data and information about our catchments.

Who is involved?
Quite simply, everyone in Ireland has a role to play. This can be from something as simple as making sure you don’t pollute your local stream, or a local community working together to establish a Rivers Trust to enhance the rivers and lakes in their area, to a Government Department or Agency helping a Minister implement a new policy to help protect and enhance all our water bodies.

This website has been developed and is maintained by the Environmental Protection Agency, and is a collaboration between the Department of Housing, Planning and Local Government, the Environmental Protection Agency, and the Local Authority Waters Programme.

Local Authority Waters Programme

The Local Authority Waters Programme coordinates the efforts of local authorities and other public bodies in the implementation of the River Basin Management Plan, and supports local community and stakeholder involvement in managing our natural waters, for everyone’s benefit.

Environmental Protection Agency

The EPA is responsible for coordinating the monitoring, assessment and reporting on the status of our 4,842 water bodies, looking at trends and changes, determining which waterbodies are at risk and what could be causing this, and drafting environmental objectives for each.

Department of Housing, Local Government and Heritage

The Department is responsible for making sure that the right policies, regulations and resources are in place to implement the Water Framework Directive, and developing a River Basin Management Plan and Programme of Measures to protect and restore our waters.