Flood Alert Info - Tidal Medway, Medway estuary and Isle of Grain

Area Description

Areas at risk of tidal flooding on the Tidal Medway, Medway estuary and Isle of Grain, including Aylesford, Medway Towns, Lower Halstow, Middle Stoke and Lower Stoke.

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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Flood Alert Currently in Force

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:
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Historical Flood Alert Messages for this Area


Flood Alert issued on 8 Jan 2019 08:51
River Medway
High water is expected along the Medway estuary as a result of a tidal surge, spring tides and strong winds. Tides will be at their highest around 2pm, Tuesday 8 January 2019, however conditions may apply one to two hours either side of the high tide. Flooding to promenades, coastal footpaths and low-lying land is possible at these times. Please avoid low-lying areas close to high tide. Flooding of properties is not forecast at this point and no flooding is expected from the hide tide overnight tonight. We are closely monitoring the situation. Our incident response staff are checking and operating defences. Detailed coastal information for those who use it. The time and date of the forecast high water at Sheerness is 14:00 on 08/01/2019. Forecast total water level of 3.73 mAOD, which is 1.07m above astronomical high tide. Winds forecast to be Force 5 north westerly. This message will be updated by 7pm, Tuesday 8 January.


Flood Alert issued on 8 Jan 2019 07:44
River Medway
High water is expected along the Medway estuary as a result of a tidal surge, spring tides and strong winds. Tides will be at their highest around 2pm, Tuesday 8 January 2019, however conditions may apply one to two hours either side of the high tide. Flooding to promenades, coastal footpaths and low-lying land is possible at these times. Please avoid low-lying areas close to high tide. Flooding of properties is not forecast at this point and no flooding is expected from the hide tide overnight tonight. We are closely monitoring the situation. Our incident response staff are checking and operating defences. Detailed coastal information for those who use it. The time and date of the forecast high water at Sheerness is 14:00 on 08/01/2019. Forecast total water level of 3.53 mAOD, which is 0.77m above astronomical high tide. Winds forecast to be Force 5 north westerly. This message will be updated by 7pm, Tuesday 8 January.


Flood Alert issued on 9 Dec 2018 09:07
River Medway
A tidal surge is expected to affect the Tidal River Medway, Medway Estuary and Isle of Grain as a result of high spring tides and strong winds. Tides will be at their highest between 1pm and 2pm today, Sunday 9th December 2018. Flooding to coastal footpaths and promenades, and low lying land and roads is possible at these times, however conditions may apply for one to two hours either side of the high tide. No property flooding is expected and no further flooding is anticipated from subsequent tides. We are closely monitoring the situation and our incident response staff are prepared to check and operate our defences. Please be careful along beaches, promenades, coastal footpaths and roads as large waves and sea spray could be dangerous. This flood alert will be removed by 5pm today, Sunday 9th December 2018.


Flood Alert issued on 8 Dec 2018 20:14
River Medway
A tidal surge is expected to affect the Medway Estuary tomorrow as a result of high spring tides and strong winds. Tides will be at their highest between 1pm and 2.30pm tomorrow, Sunday 9th December 2018. Flooding to promenades and coastal footpaths, and low lying land and roads is possible at these times, however conditions may apply one to two hours either side of the high tide. Flooding of properties is not forecast at this point and no flooding is expected from the hide tide overnight tonight. We are closely monitoring the situation and our incident response staff will be checking and operating defences tomorrow. Please be careful along beaches, promenades, coastal footpaths and roads as large waves and sea spray could be dangerous. This message will be updated by 9am Sunday 9th December 2018.


Flood Alert issued on 1 Feb 2018 08:54
River Medway, Medway Estuary
This alert is issued for the 13:05 high tide this afternoon, Thursday 1 February. We are currently in a period of high spring tides. A positive tidal surge associated with low pressure is also raising water levels around the coast and in tidal areas. Minor flooding of low lying coastal land and roads is possible. Please be prepared for tides to be higher than usual. No property flooding is expected at this time. This message will be updated or removed following the high tide this afternoon. We will continue to monitor the situation and further flood alerts may be required in the coming days. Detailed tidal information; the forecast high tide level at Sheerness is 3.58 mAOD at 13:05 on Thursday 1 February, this is 0.41 metres above astronomical tide level.


Flood Alert issued on 18 Jan 2018 08:16
River Medway, Medway Estuary
This flood alert is issued for the high tide at Sheerness at 1:30pm (13:30), Thursday 18th January. Strong westerly winds are forecast during a period of high tides combined with surge. Water levels are expected to overtop coastal defences and foreshores between approximately 1-2pm today. Expect tides to be higher than usual. Low lying areas near the coast will be at risk of flooding. People are advised to stay away from risk areas and take care next to the coast. We do not currently expect that subsequent tides will reach alert threshold but will continue to monitor the situation. Property flooding is not expected, but we will issue flood warnings if required to do so. Detailed tidal information for those who use it: the forecast high tide level is 3.81 mAOD, this is 1.15 metres above the astronomical tide level.


Flood Alert issued on 4 Jan 2018 09:06
River Medway, Medway Estuary
This alert is issued for the 14:00pm high tide this afternoon, Thursday 4th January. We are currently in a period of high tides with strong winds and large waves raising water levels around the coast and in tidal areas. Minor flooding of low lying coastal land and roads is possible from wave overtopping of defences and sea spray. Please be prepared for tides to be higher than usual. No property flooding is expected at this time. This message will be updated or removed following the high tide this afternoon. We will continue to monitor the situation and will have staff in the area during this period. Further alerts may be required in the coming days. Detailed tidal information; the forecast high tide level at Sheerness is 3.51 mAOD at 14:00pm on Thursday 4th January, this is 0.26 metres above astronomical tide level.


Flood Alert issued on 5 Nov 2017 14:00
River Medway, Medway Estuary
A tidal surge is forecast for the next high tides at Sheerness on Monday 6th November. An astronomical high tide of 3.22 metres above Ordnance Datum is expected at 01:30 at Sheerness. A positive surge of 0.31 metres may also be expected, giving a total water level of approximately 3.53 metres above Ordnance Datum. Wind direction is north westerly. Wind speed is forecast Gale Force 5. These levels are lower than those received during high tides at the beginning of October. Tidal flooding of low lying coastal areas may be expected from these tides. We do not expect flooding of property. Further tides are not forecast to be of concern and this Flood Alert will be removed Monday morning. People are advised to stay away from risk areas and take care next to the coast.


Flood Alert issued on 6 Oct 2017 08:44
River Medway, Medway Estuary
This flood alert is issued for the high tide at Sheerness at 1:45pm (13:45), Friday 6th October. This tide is forecast to be lower than yesterday’s tide, recorded as 3.69 m AOD. North westerly winds and surge are forecast during a period of high tides. Water levels may overtop coastal defences and foreshores between approximately 1pm and 3pm this afternoon. Key coastal areas at greatest risk include Canal Road and Esplanade in Strood. People are advised to stay away from risk areas and take care next to the coast. We will continue to monitor the situation and reissue this alert for any subsequent tides if required. We do not currently expect property flooding. We have been working closely with our professional partners. You may also see our staff in the area during daylight hours today. Detailed tidal information for those who use it: the forecast high tide level is 3.49 mAOD, this is 0.46 metres above the astronomical tide level.


Flood Alert issued on 5 Oct 2017 15:16
River Medway, Medway Estuary
This flood alert is issued for the overnight high tide at Sheerness at 1:30am (01:30), Friday 6th October. This tide is forecast to be lower than the lunchtime tide, recorded as 3.69 m AOD. North westerly winds and surge are forecast during a period of high tides. Water levels are expected to overtop coastal defences and foreshores between approximately midnight and 2am tonight. Key coastal areas at greatest risk include Canal Road and Esplanade in Strood. People are advised to stay away from risk areas and take care next to the coast. We will continue to monitor the situation and reissue this alert for any subsequent tides if required. We do not currently expect property flooding. We have been working closely with our professional partners, and our staff have been in the area during daylight hours today. Detailed tidal information for those who use it: the forecast high tide level is 3.55 mAOD, this is 0.49 metres above the astronomical tide level.


Flood Alert issued on 5 Oct 2017 10:08
River Medway, Medway Estuary
This flood alert is issued for the high tide at Sheerness at 1pm (13:00), today Thursday 5th October. North westerly winds are forecast during a period of high tides combined with surge. Water levels are expected to overtop coastal defences and foreshores between noon and 2pm this afternoon. Expect tides to be higher than usual. Key coastal areas at greatest risk include Canal Road and Esplanade in Strood. People are advised to stay away from risk areas and take care next to the coast. We will continue to monitor the situation and reissue this alert for any subsequent tides if required. We do not currently expect property flooding, but we will issue flood warnings if required to do so. We have been working closely with our professional partners, and our staff are expected in the area during daylight hours today. Detailed tidal information for those who use it: the forecast high tide level is 3.75 mAOD, this is 0.87 metres above the astronomical tide level.


Flood Alert issued on 4 Oct 2017 20:44
River Medway, Medway Estuary
This flood alert is issued for the high tide at Sheerness at 1pm (13:00), Thursday 5th October. North westerly winds are forecast during a period of high tides combined with surge. Water levels are expected to overtop coastal defences and foreshores between approximately noon and 2pm tomorrow. Expect tides to be higher than usual. Key coastal areas at greatest risk include Canal Road and Esplanade in Strood. People are advised to stay away from risk areas and take care next to the coast. We will continue to monitor the situation and reissue this alert for subsequent tides if required. We do not currently expect property flooding, but we will issue flood warnings if required. We have been working closely with our professional partners, and our staff are expected in the area during daylight hours tomorrow. Detailed tidal information for those who use it: the forecast high tide level is 3.68 mAOD, this is 0.8 metres above the astronomical tide level.


Flood Alert issued on 4 Oct 2017 20:01
River Medway, Medway Estuary
This flood alert is issued for the high tide at Sheerness at 1pm (13:00), Thursday 5th October. North westerly winds are forecast during a period of high tides combined with surge. Water levels are expected to overtop coastal defences and foreshores between approximately noon and 2pm tomorrow. Expect tides to be higher than usual. Key coastal areas at greatest risk include Canal Road and Esplanade in Strood. People are advised to stay away from risk areas and take care next to the coast. We will continue to monitor the situation and reissue this alert for subsequent tides if required. We do not currently expect property flooding, but we will issue flood warnings if required. We have been working closely with our professional partners, and our staff are expected in the area during daylight hours tomorrow. Detailed tidal information for those who use it: the forecast high tide level is 3.68 mAOD, this is 1.03 metres above the astronomical tide level.