A Flood Alert was issued for Groundwater flooding in Finchdean, Dean Lane End and Rowlands Castle in Hampshire, West Sussex on 2nd March 2026. Affected watercourses included the Groundwater.
During this event, FloodRadar monitoring gauges recorded notable rises. The Hermitage Stream at Havant rose 0.14m, peaking at 5.42m, while the Petersfield Stream at Borough Grove climbed 0.11m.
Environment Agency advice issued
Groundwater levels at the borehole in Finchdean are very slowly falling. In the last week, the level has fallen by 9cm. Flooding is expected to be affecting a small number of cellars in Finchdean, Dean Lane End and Rowlands Castle. Road flooding will be deep in all villages. Sewerage system impacts could also be possible. Mostly dry weather is forecast from Monday 02/03/2026 to Friday 06/03/2026. Groundwater levels will continue to slowly fall over the next week. We are closely monitoring the situation. Please do not walk or drive through flood water. This message will be updated by 18:00 09/0
Monitoring gauges during this event
| Station | River | Rise | Peak |
|---|---|---|---|
| Havant | Hermitage Stream | +0.14m | 5.42m |
| Borough Grove | Petersfield Stream | +0.11m | 59.21m |
| West Street | River Lavant | +0.09m | 7.34m |
| Denmead | River Wallington | +0.08m | 33.54m |
| Emsworth | West Brook | +0.06m | 2.02m |