River Levels

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River Levels

Anglesey Catchment

Message issued at 5:32am, Monday 1st December 2025

This is an archived message. The status has changed more recently.

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Flooding possible. Be prepared.

Flood Alert

Flooding of low-lying land and roads is expected. Rainfall is currently affecting this area. River Levels will be above normal levels.

Information supplied by Natural Resources Wales / Cyfoeth Naturiol Cymru

This information last updated 5:32am, Monday 1st December 2025.

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Most recent flood warnings and alerts for Anglesey Catchment

Flood Warning Area Details

Areas around the rivers across the whole of the island

Region: North

Country: Wales

Watercourses covered: Cefni, Alaw, Ffraw, Braint, Gwna, Crigyll

Area covered by this alert location

The area bounded in blue on the map shows the area covered by flood alerts and warnings for Anglesey Catchment.

Note: the area shown on the map is the area covered by flood alerts and warnings. It is not a live map of current flooding. The area covered broadly equates to the area where the risk of flooding in any year is greater than 1% (the "hundred year" flood risk).

Other Nearby Flood Warning Locations

North Gwynedd Catchment
areas around the rivers of North West Wales, from Abergwyngregyn to Aberdaron.

No current or recent warnings.

Lleyn Peninsula and Cardigan Bay Coastline
areas along the North West Wales coastline from the Menai Straits to Aberdyfi

No current or recent warnings.

North Wales Coast
areas along the North Wales coast from the Dee estuary to the east coast of Anglesey

No current or recent warnings.

Mawddach and Wnion Catchment
areas around the river Mawddach and river Wnion, from Fairbourne to Ganllwyd and Rhydymain

No current or recent warnings.

Glaslyn and Dwyryd Catchment
areas around the river Glaslyn and river Dwyryd, from Dyffryn Ardudwy to Nant Gwynant

No current or recent warnings.

RiverLevels.uk is an independent website. It is not associated with the Environment Agency or any other supplier of river level information. All data used on this site is supplied under licence. For queries about the data, please contact the underlying supplier.

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