📢 Please take a minute to read this personal message from the creator of River Levels UK
Flooding possible. Be prepared.
High groundwater levels may lead to flooding.
Flooding is possible . Light rain (10mm) was recorded in the last week.
At the borehole in Oakley, the level has risen by 10cm in the last week. Flooding is affecting the ability of septic tanks to operate effectively. The River Test will be flowing in Deane and Ashe. Groundwater is now very close to the level we expect cellar flooding in Deane. From Thursday 12/03/2026 into Friday 13/03/2026, between 15 and 20mm of rain is expected to affect Hampshire. Saturday 14/03/2026 and Sunday 15/03/2026 are expected to be mostly dry. If heavy rain affects the area, cellar flooding in Deane is likely from this weekend. Groundwater levels will remain high throughout March.
We are closely monitoring the situation .
Residents are advised to prepare property resilience measures and ensure that pumps are working where they have been installed , including pumps used to help reduce water levels.
This message will be updated by 6:00PM on 18 March 2026 or as the situation changes.
Information supplied by the Environment Agency
This information last updated 1:10pm, Wednesday 11th March.
Areas at risk of groundwater flooding in Deane and Ashe in the Upper Test catchment in North Hampshire
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 Deane and Ashe in North Hampshire.
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.