FloodRadar
Log inCreate free account
FloodRadar
Log inCreate free account
Does Marlow flood? 132 postcodes in Marlow are in the Environment Agency's rivers-and-sea flood-risk data (17 High, 45 Medium likelihood) — the breakdown is further down this page.
No official flood warning is active nearby and the closest river stations are within normal ranges.
Updated 2026-10-09 15:11:01 UTC · Official GOV.UK warnings · Flood preparation & help guide
Marlow is a town and civil parish on the River Thames in Buckinghamshire, England, 4 miles (6 km) southwest of High Wycombe, 5 miles (8 km) northwest of Maidenhead and 33 miles (53 km) west of central London.
Ordnance Survey places 132 postcodes in Marlow in the Environment Agency's rivers-and-sea flood-risk dataset (Risk of Flooding from Rivers and Sea). Each postcode is counted once, under the worst band any of its properties reaches; together they hold 1,821 properties in the EA dataset's likelihood bands.
| EA likelihood band | Postcodes (worst band) | Properties in the EA dataset | of which homes |
|---|---|---|---|
| High | 17 | 144 | 114 |
| Medium | 45 | 468 | 403 |
| Low | 70 | 1,179 | 879 |
| Very low | 0 | 30 | 30 |
| All bands | 132 | 1,821 | 1,426 |
This dataset covers flooding from rivers and the sea only — one of five flood sources. Surface water, groundwater, sewers and reservoirs are assessed separately, so a postcode missing from it is not proof that a place cannot flood. The band describes the land around properties (allowing for defences), not any single address and not today's conditions.
…and 32 more at-risk postcodes, listed on the district pages below.
Flood-risk bands: © Environment Agency copyright and/or database right 2025. All rights reserved. Some features of this map are based on digital spatial data from the Centre for Ecology & Hydrology, © NERC (CEH). © Crown Copyright and Database Rights 2025 OS AC0000807064. This product is produced in part from PAF® and Multiple Residence Data, the copyright in which is owned by Royal Mail Group Limited and/or Royal Mail Group plc. All rights reserved. Licence number AC0000807064.
Place names: Contains OS data © Crown copyright and database rights 2026. Contains Royal Mail data © Royal Mail copyright and database right 2026. Contains National Statistics data © Crown copyright and database right 2026. Licensed under the Open Government Licence v3.0.
The nearest watercourse on the river map is the River Thames, about 790 m from the middle of Marlow's gauges. It flows on to the sea.
A gauge downstream shows water that has already passed this point; one upstream sees it first. Distances along the river are from the point on the River Thames nearest the middle of Marlow's gauges. From Ordnance Survey’s river map (OS Open Rivers), which leaves out small streams, ditches and culverts, so a nearer one may exist. This describes where water goes on the map; it says nothing about flooding at any address. Contains OS data © Crown copyright and database rights 2026.
Marlow is monitored by 3 Environment Agency river level stations on the Groundwater Level, the River Thames, in Buckinghamshire. Water levels are updated every 15 minutes, providing real-time flood monitoring for the area.
The Groundwater Level is monitored by 1 station (Ray Farm). The River Thames is monitored by 2 stations (Marlow Lock, Temple Lock). Each station records water levels continuously, with data synced to FloodRadar every 5 minutes.
There are 8 Environment Agency flood warning areas within 10km of Marlow. When the EA issues a flood warning for any of these areas, it will appear on this page. These include: River Thames around Bisham village, Bisham Abbey, Stoney Ware areas in Bisham, Marlow Bridge, Bream Close, Trout Close and Pound Crescent areas as well as the Thames Industrial Estate and Dedmere, Fieldhouse and Westhorpe Farm areas of Marlow; River Thames from All Saints Church, Bisham to Little Marlow including Marlow Bridge Lane and Quarry Wood Road areas of Bisham as well as the Lock Island, Gossmore areas, Meadow Close and Pike Close, Pound Lane and Garnet Court areas of Marlow; River Thames from Hurley to Cookham including Harleyford, Bisham, Marlow and Bourne End; River Thames at Hurley and Harleyford including Hurley Lock and Temple Lock, Frogmill Spinney, Temple Mill Island and Temple.
There is 1 storm overflow within 5km of Marlow. None of the 1 with a reporting monitor is currently discharging. Enable "Sewage" on the map above to see their locations.
It has its own page of live status and past discharges:
If flooding is forecast in Marlow, call Floodline on 0345 988 1188 for the latest information. Move valuables upstairs, turn off gas and electricity if safe to do so, and avoid walking or driving through flood water. Sign up for flood warnings on any station page above to receive email alerts when water levels rise. For emergency numbers, a preparation checklist and insurance guidance, see our flood help & preparation guide.
Marlow gets about 721 mm of rain a year on average (wettest month November, 81 mm; driest March, 43 mm). That is 38% drier than the UK as a whole, which averages 1,163 mm a year. See the rain gauges →
A thirty-year average for the area, not a forecast and not a flood risk on its own. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 2.3 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
Floods whose mapped extent (EA Recorded Flood Outlines) reached within ~5 km of the town centre — most recent first. These are records of mapped extents, not a full list of floods. See them on the map →
Records, not floods: no outline on the record is not evidence a place has not flooded.
Current verdict: Normal. No official flood warning is active nearby and the closest river stations are within normal ranges.
Marlow has river level monitoring on Groundwater Level, River Thames — 3 monitoring stations in total.
Use the GOV.UK Check for Flooding service (check-for-flooding.service.gov.uk) or call Floodline on 0345 988 1188 (24 hours). You can also set up free FloodRadar email or browser alerts from any station page above.
Follow official advice: move valuables and vehicles to safety, never walk or drive through flood water, turn off gas and electricity if safe, and check on vulnerable neighbours. See our flood preparation guide at floodradar.co.uk/flood-help.
Yes — the Environment Agency's Recorded Flood Outlines dataset shows 60 recorded flood extents around the town centre since 1703, most recently in 2013. That is a count of mapped extents, not of separate floods. Records, not floods: no outline on the record is not evidence a place has not flooded. See the flood history link below.
FloodRadar helper · beta