Flood Alert Info - Groundwater flooding in the Henley and Assendon area
Area Description
Communities at risk of groundwater flooding including Turville, Skirmett, Stoner, Middle and Lower Assendon and parts of Henley.
This is a Flood Alert Area. For this area the highest level of flood notification that you will receive is a Flood Alert. No Flood Warnings or Severe Flood Warnings are issued for this area.
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There are no Flood Alerts currently in force for this area. See below for historical flood warnings.
Area Covered by this Flood Alert
The orange highlighted area on the map below outlines the area covered by this Flood Alert.
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Flood Alert History
Number of historic Flood Alerts that have previously been recorded for this area:
We can provide a Flood Insurance Quote for properties in the Henley-On-Thames area
Historical Flood Alerts for this Area
Flood Alert issued on 13 May 2025 13:13
Groundwater
Groundwater levels are high but currently falling at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and are at a level where communities may be affected by groundwater flooding. We expect levels to continue slowly falling over the next few weeks and the forecast for the next week is predominantly dry. Low lying land and properties will therefore continue to be at risk of flooding. We are continuing to monitor groundwater levels and will update this message next week by 20/05/2025, or as the situation changes.
Flood Alert issued on 6 May 2025 11:32
Groundwater
Groundwater levels remain high but have been very slowly falling at our Stonor borehole near Henley and Assendon. Groundwater is higher than normal for this time of year and remains at a level at which communities may be affected by groundwater flooding.
This weather forecast for this week is predominantly dry. We expect groundwater levels to remain high for the next few weeks and levels continue to be sensitive to sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding.
We are continuing to monitor groundwater levels and will update this message next week, by 13 May 2025, or as the situation changes.
Flood Alert issued on 29 Apr 2025 10:01
Groundwater
Groundwater levels remain high at our Stonor borehole near Henley and Assendon. Groundwater is higher than normal for this time of year and remains at a level at which communities may be affected by groundwater flooding.
This week is forecast to be changeable. We expect groundwater levels to remain high for the next few weeks and levels are sensitive to sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding.
We are continuing to monitor groundwater levels and will update this message next week, by 6 May 2025, or as the situation changes.
Flood Alert issued on 22 Apr 2025 13:12
Groundwater
Groundwater levels remain high at our Stonor borehole near Henley and Assendon. Groundwater is higher than normal for this time of year and remains at a level at which communities may be affected by groundwater flooding. This week is forecast to be changeable. We expect groundwater levels to remain high for the next few weeks and levels are sensitive to sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding. We are continuing to monitor groundwater levels and will update this message next week, by 29/04/2025, or as the situation changes.
Flood Alert issued on 15 Apr 2025 10:44
Groundwater
Groundwater levels remain high at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and remain at a level at which communities may be affected by groundwater flooding. This week is forecast to be unsettled. We expect groundwater levels to remain high for the next few weeks and levels are sensitive to sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding. We are continuing to monitor groundwater levels and will update this message next week, by 22/04/2025, or as the situation changes.
Flood Alert issued on 8 Apr 2025 14:40
Groundwater
Groundwater levels remain high at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and remain at a level at which communities may be affected by groundwater flooding. This week is forecast to be predominantly dry. We expect groundwater levels to remain high for the next few weeks and levels are sensitive to sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding. We are continuing to monitor groundwater levels and will update this message next week, by 15/04/2025, or as the situation changes.
Flood Alert issued on 1 Apr 2025 16:50
Groundwater
Groundwater levels remain high at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and remain at a level at which communities may be affected by groundwater flooding.
This week is forecast to be predominantly dry. We expect groundwater levels to remain high for the next few weeks and levels are sensitive to sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding. We are continuing to monitor groundwater levels and will update this message next week, by 08/04/2025, or as the situation changes.
Flood Alert issued on 25 Mar 2025 10:10
Groundwater
Groundwater levels remain high at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding. This week is forecast to begin predominantly dry, but more unsettled conditions are expected towards the end of the week. We expect groundwater levels to remain high for the next few weeks and levels are sensitive to sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding. We are continuing to monitor groundwater levels and will update this message next week, by 01/04/2025, or as the situation changes.
Flood Alert issued on 18 Mar 2025 11:05
Groundwater
Groundwater levels are high but currently stable at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding. We expect levels to remain high for the rest of the winter period and sensitive to further sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding. We are continuing to monitor groundwater levels and will update this message next week, by 25/03/2025, or as the situation changes.
Flood Alert issued on 11 Mar 2025 09:35
Groundwater
Groundwater levels are high and continuing to rise slowly at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding. We expect levels to remain high for the rest of the winter period and sensitive to further sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding. We are continuing to monitor groundwater levels and will update this message next week, by 18/03/2025, or as the situation changes.
Flood Alert issued on 4 Mar 2025 10:28
Groundwater
Groundwater levels are high and continuing to rise slowly at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding. We expect levels to remain high for the rest of the winter period and sensitive to further sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding. We are continuing to monitor groundwater levels and will update this message next week, by 11/03/2025, or as the situation changes.
Flood Alert issued on 25 Feb 2025 15:06
Groundwater
Groundwater levels are high and continuing to rise slowly at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding. We expect levels to remain high for the rest of the winter period and sensitive to further sustained periods of rainfall. Low lying land, roads and properties will therefore continue to be at risk of flooding. We are continuing to monitor groundwater levels and will update this message next week, by 04/03/2025, or as the situation changes.
Flood Alert issued on 18 Feb 2025 09:34
Groundwater
Groundwater levels are continuing to rise slowly at our Stonor borehole near Henley and Assendon.
Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding. We expect levels to remain high for the rest of the winter. Low lying land, roads and properties will therefore continue to be at risk of flooding.
We are continuing to monitor groundwater levels and will update this message next week, by 25/02/2025, or as the situation changes.
Flood Alert issued on 11 Feb 2025 11:25
Groundwater
Groundwater levels are continuing to rise slowly at our Stonor borehole near Henley and Assendon.
Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding. We expect levels to remain high for the rest of the winter. Low lying land, roads and properties will therefore continue to be at risk of flooding.
We are continuing to monitor groundwater levels and will update this message next week, by 18/02/2025, or as the situation changes.
Flood Alert issued on 4 Feb 2025 13:37
Groundwater
Groundwater levels are currently rising steadily at our Stonor borehole near Henley and Assendon following rainfall over recent months.
Groundwater levels are above normal and have now reached a level at which communities may be affected by groundwater flooding.
We expect levels to continue rising slowly over the coming weeks and levels will remain sensitive to further sustained rainfall. Low-lying land, cellars and roads will therefore continue to be at risk of flooding.
Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. We are continuing to monitor groundwater levels and will update this message next week, 11/02/2025, or as the situation changes.
Flood Alert issued on 28 Jan 2025 09:53
Groundwater
Groundwater levels are currently rising steadily at our Stonor borehole near Henley and Assendon following rainfall over recent months. Groundwater levels are above normal and have now reached a level at which communities may be affected by groundwater flooding. We expect levels to continue rising slowly over the coming weeks and levels will remain sensitive to further sustained rainfall. Low-lying land, cellars and roads will therefore continue to be at risk of flooding.
Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. We are continuing to monitor groundwater levels and will update this message next week, on 4 February 2025, or as the situation changes.
Flood Alert issued on 22 Jan 2025 08:40
Groundwater
Groundwater levels are currently rising steadily at our Stonor borehole near Henley and Assendon following rainfall over recent months.
Groundwater levels are above normal for this time of year and have now reached a level at which communities may be affected by groundwater flooding.
The forecast is for low pressure moving in on Thursday 23/01/25 bringing rain into the weekend. We expect levels to continue rising slowly over the coming weeks and levels will remain sensitive to further sustained rainfall. Low-lying land, cellars and roads will therefore continue to be at risk of flooding.
Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. We are continuing to monitor groundwater levels and will update this message next week, 28/01/2025, or as the situation changes.
Flood Alert issued on 21 Jan 2025 15:51
Groundwater
Groundwater levels are currently rising steadily at our Stonor borehole near Henley and Assendon following rainfall over recent months.
Groundwater levels are above normal for this time of year and have now reached a level at which communities may be affected by groundwater flooding.
The forecast is for a predominantly dry few days before low pressure and rain moves in from Thursday (23/01/2025) into Friday. We expect levels to continue rising slowly over the coming weeks and levels will remain sensitive to further sustained rainfall. Low-lying land, cellars and roads will therefore continue to be at risk of flooding.
Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. We are continuing to monitor groundwater levels and will update this message tomorrow, 22/01/2025, or as the situation changes.
Flood Alert issued on 28 Jun 2024 09:32
Groundwater
Groundwater levels are high but falling at our Stonor Estate borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and communities may continue to be affected by groundwater flooding. The catchment remains sensitive to further rainfall due to the high groundwater levels. The weather forecast is for dry and warm weather over the next 5 days. Low-lying land, gardens, roads, and cellars continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks.
Avoid driving or walking through floodwater as there may be concealed hazards. We are continuing to monitor groundwater levels and will update this message on Friday, 05/07/2024, or as the situation changes.
Flood Alert issued on 21 Jun 2024 17:27
Groundwater
Groundwater levels are high, but falling slowly, at our Stonor Estate borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and communities may continue to be affected by groundwater flooding as the catchment remains sensitive to further rainfall due to high groundwater levels. The weather forecast is for some overnight rain tonight (21/06/2024) before a period of continued dry and warm weather. Low-lying land, gardens, roads, and cellars will continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We are continuing to monitor groundwater levels and will update this message Friday, 28/06/2024, or as the situation changes.
Flood Alert issued on 14 Jun 2024 10:23
Groundwater
Groundwater levels are high, but falling slowly, at our Stonor Estate borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and communities may continue to be affected by groundwater flooding as the catchment remains sensitive to further rainfall due to high groundwater levels. The weather forecast is for isolated showers today (14/06/2024) which could be heavy at times. This forecast continues over the weekend and into early next week. From Tuesday onwards, it is expected to be predominantly dry with the chance of scattered showers. Low-lying land, gardens, roads, and cellars will continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We are continuing to monitor groundwater levels and will update this message Friday, 21/06/2024, or as the situation changes.
Flood Alert issued on 7 Jun 2024 12:21
Groundwater
Groundwater levels are high, but falling slowly, at our Stonor Estate borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and communities may continue to be affected by groundwater flooding as the catchment remains sensitive to further rainfall due to high groundwater levels. The weather forecast is for a dry day today (07/06/2024) and into the weekend. Next week from Monday 10/06/2024 is expected to be predominantly dry, but showers may develop through Monday and Tuesday. Rainfall totals are not expected to be significant. Low-lying land, gardens, roads, and cellars will continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We are continuing to monitor groundwater levels and will update this message Friday, 14/06/2024, or as the situation changes.
Flood Alert issued on 31 May 2024 10:22
Groundwater
Groundwater levels are high, but falling slowly, at our Stonor Estate borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and communities may continue to be affected by groundwater flooding as the catchment remains sensitive to further rainfall due to saturated ground and high groundwater levels. The weather forecast is for isolated showers today, some of which could be heavy. Saturday and Sunday are forecast to be dry with further unsettled weather expected next week. Low-lying land, gardens, roads, and cellars will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We are continuing to monitor groundwater levels and will update this message Friday, 07/06/2024, or as the situation changes.
Flood Alert issued on 24 May 2024 11:13
Groundwater
Groundwater levels are high but falling slowly at our Stonor Estate borehole near Henley and Assendon. Groundwater levels are above normal for this time of year, and communities may continue to be affected by groundwater flooding as the catchment remains sensitive to further rainfall due to saturated ground and high groundwater levels.
The weather forecast for the next week is dry on Friday and most of Saturday, with further unsettled weather expected from Sunday, 26/05/2024. Low-lying land, gardens, roads, and cellars will therefore continue to be at risk of flooding.
Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards.
We are continuing to monitor groundwater levels and will update this message next week by Friday, 31/05/2024, or as the situation changes.
Flood Alert issued on 17 May 2024 14:05
Groundwater
Groundwater levels are high but falling slowly at our Stonor Estate borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and remain at a level where communities may be affected by groundwater flooding within the next few weeks. Groundwater levels remain sensitive to further rainfall due to saturated ground and high groundwater levels. Low-lying land, roads and cellars will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We have staff in the area checking impacts on the ground and we are continuing to monitor groundwater levels. We will update this message next week by 24/05/2024, or as the situation changes.
Flood Alert issued on 10 May 2024 15:02
Groundwater
Groundwater levels are high but falling very slowly at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and remain at a level where communities may be affected by groundwater flooding within the next few weeks. Groundwater levels remain sensitive to further rainfall due to saturated ground and high groundwater levels. Low-lying land, roads and cellars will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We have staff in the area checking impacts on the ground and we are continuing to monitor groundwater levels. We will update this message next week by 17/05/2024, or as the situation changes.
Flood Alert issued on 3 May 2024 14:26
Groundwater
Groundwater levels are high but stable at our Stonor borehole near Henley and Assendon. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding within the next few weeks. Groundwater levels remain sensitive to further rainfall due to saturated ground and high groundwater levels. Low-lying land, roads and cellars will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We have staff in the area checking impacts on the ground and we are continuing to monitor groundwater levels. We will update this message next week by 10/05/2024, or as the situation changes.
Flood Alert issued on 26 Apr 2024 12:34
Groundwater
Groundwater levels are high but stable at our Stonor borehole near Henley and Assendon as a result of recent rainfall. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding within the next few weeks. Groundwater levels remain sensitive to further rainfall due to saturated ground and high groundwater levels. Low-lying land, roads and cellars will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We have staff in the area checking impacts on the ground and we are continuing to monitor groundwater levels. We will update this message next week by 03/05/2024, or as the situation changes.
Flood Alert issued on 19 Apr 2024 08:01
Groundwater
Groundwater levels are high but stable at our Stonor borehole near Henley and Assendon as a result of recent rainfall. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding within the next few weeks. Groundwater levels remain sensitive to further rainfall due to saturated ground and high groundwater levels. Low-lying land, roads and cellars will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We have staff in the area checking impacts on the ground and we are continuing to monitor groundwater levels. We will update this message next week by 26/04/2024, or as the situation changes.
Flood Alert issued on 13 Apr 2024 09:17
Groundwater
Groundwater levels are high but stable at our Stonor borehole near Henley and Assendon as a result of recent rainfall. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding within the next few weeks. Groundwater levels remain sensitive to further rainfall due to saturated ground and high groundwater levels. Low-lying land, roads and cellars will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We have staff in the area checking impacts on the ground and we are continuing to monitor groundwater levels. We will update this message next week by 19/04/2024, or as the situation changes.
Flood Alert issued on 12 Apr 2024 09:59
Groundwater
Groundwater levels are high but stable at our Stonor borehole near Henley and Assendon as a result of recent rainfall. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding within the next few weeks. Groundwater levels remain sensitive to further rainfall due to saturated ground and high groundwater levels. Low-lying land and roads will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We have staff in the area checking impacts on the ground and we are continuing to monitor groundwater levels. We will update this message next week by 12/04/2024, or as the situation changes.
Flood Alert issued on 5 Apr 2024 09:42
Groundwater
Groundwater levels are high but stable at our Stonor borehole near Henley and Assendon as a result of recent rainfall. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding within the next few weeks. Groundwater levels remain sensitive to further rainfall due to saturated ground and high groundwater levels. Low-lying land and roads will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. Avoid driving or walking through floodwater as there may be concealed hazards. We have staff in the area checking impacts on the ground and we are continuing to monitor groundwater levels. We will update this message next week by 12/04/2024, or as the situation changes.
Flood Alert issued on 29 Mar 2024 08:42
Groundwater
Groundwater levels are slowly rising at our Stonor borehole near Henley and Assendon as a result of recent rainfall. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding within the next few weeks. Groundwater levels remain sensitive to further rainfall due to saturated ground and high groundwater levels. Therefore groundwater levels will continue to slowly rise over the coming days in response to recent rainfall. Low-lying land and roads will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. We are continuing to monitor groundwater levels and will update this message next week by 05/04/2024, or as the situation changes.
Flood Alert issued on 22 Mar 2024 12:51
Groundwater
Groundwater levels are high but currently stable at our Stonor borehole near Henley and Assendon as a result of recent rainfall. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by groundwater flooding within the next few weeks. Groundwater levels remain sensitive to further rainfall due to saturated ground and high groundwater levels. Low-lying land and roads will therefore continue to be at risk of flooding. Due to the nature of groundwater flooding, this situation could continue for several weeks or longer. We are continuing to monitor groundwater levels and will update this message next week by 29/03/2024, or as the situation changes.
Flood Alert issued on 15 Mar 2024 10:01
Groundwater
Groundwater levels are currently rising at our Stonor borehole near Henley and Assendon following recent rainfall across the area. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by flooding from groundwater. Groundwater levels are sensitive to rainfall due to saturated ground and we expect groundwater levels will continue to rise over the coming weeks in response to recent rainfall. Basements, low-lying land and roads will therefore continue to be at risk of flooding. Due to the nature of groundwater behaviour, this situation could continue for several weeks or longer. We are continuing to monitor groundwater levels and will update this message on 22/03/2024, or as the situation changes.
Flood Alert issued on 8 Mar 2024 09:19
Groundwater
Groundwater levels are currently rising at our Stonor borehole near Henley and Assendon following recent rainfall across the area. Groundwater levels are above normal for this time of year and have now reached a level where communities may be affected by flooding from groundwater. Groundwater levels are sensitive to rainfall due to saturated ground and we expect groundwater levels will continue to rise over the coming weeks in response to recent rainfall. Basements, low-lying land and roads will therefore continue to be at risk of flooding. Due to the nature of groundwater behaviour, this situation could continue for several weeks or longer.
We are continuing to monitor groundwater levels and will update this message on 15/03/2024, or as the situation changes.