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Flooding possible. Be prepared.
Groundwater levels in the Bourne Valley are high.
At the borehole in Vernham Dean, the level peaked on Wednesday 25/02/2026, and has since fallen by 29cm. In Upton, levels are high but steady. Flooding is expected to be affecting a small number of cellars in Upton. Septic tanks will also be struggling to operate properly. Currently, we do not expect impacts to property at Vernham Dean, Hurstbourne Tarrant, Stoke or St Mary Bourne to be occurring. From Tuesday 03/03/2026 to Saturday 07/03/2026, mostly dry weather is expected. Groundwater levels will continue to slowly fall over the next week.
We are closely monitoring the situation.
Residents across the Bourne Valley are advised to prepare property resilience measures and ensure that pumps are working where they have been installed in case levels begin to rise again.
This message will be updated by 18:00 10/03/2026.
Information supplied by the Environment Agency
This information last updated 11:43am, Tuesday 3rd March.
Communities at risk of groundwater flooding in Vernham Dean, Upton and the Bourne Valley in North Hampshire including Hurstbourne Tarrant and St Mary Bourne
Region: Solent and South Downs
Country: England
Counties covered: Hampshire
Watercourses covered: Groundwater
The area bounded in blue on the map shows the area covered by flood alerts and warnings for Groundwater flooding in Vernham Dean, Upton and the Bourne Valley.
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).
No current or recent warnings.
No current or recent warnings.