FloodRadar
Log inCreate free account
FloodRadar
Log inCreate free account
Bournemouth, Bournemouth, Christchurch and Poole
Up to Low likelihood
Properties in BH11 9LG sit in the Environment Agency's Low flood-likelihood band (worst property). The band is the worst found in the postcode — it describes the land around properties (defence-adjusted, rivers & sea), not any single address, and not today's conditions.
| Likelihood band | Annual chance | Properties | Of which homes |
|---|---|---|---|
| High | greater than 3.3% | 0 | 0 |
| Medium | 1% – 3.3% | 0 | 0 |
| Low | 0.1% – 1% | 1 | 1 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a low-likelihood area has a 2–22% chance of flooding at least once.
BH11 9LG gets about 894 mm of rain a year on average (wettest month November, 111 mm; driest May, 51 mm). That is 23% drier than the UK as a whole, which averages 1,163 mm a year.
A thirty-year average for the surrounding area, not a measurement at this address and not a flood risk on its own: a dry area floods when a storm sits over it, and a wet one may drain away perfectly well. Source: Met Office HadUK-Grid 1991–2020 (5 km grid), 1.9 km away. Average rainfall: HadUK-Grid v1.3.2, Met Office. Contains public sector information licensed under the Open Government Licence v3.0.
The ground here sits at about 21 m above sea level and falls 22 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the south-west, 9.2 m higher.
Because properties in the low likelihood band; 6 recorded flood outlines mapped nearby; 359 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around BH11 9LG. The small panels are illustrative previews of the report's per-layer map views — the full report draws each layer for real, plus recorded extents, defences and a building picker on an interactive map.
Warnings cover flood areas, not individual addresses.
| Date | Mapped flood extent | Approx. distance |
|---|---|---|
| Jan 2014 | Flood Extents_Winter 2013 to 2014 | ~13.2 km |
| Dec 2013 | Kinson, Bournemouth_Winter 2013 to 2014 | ~0.7 km |
| Feb 2009 | Stour Flood 97 | ~1.1 km |
| Feb 2009 | Stour Flood 100 | ~1.4 km |
| Feb 2009 | Stour Flood 88 | ~1.5 km |
| Feb 2009 | Stour Flood 101 | ~0.8 km |
These are extents the Environment Agency has mapped, not a list of every flood. Records, not floods: no outline on the record is not evidence a place has not flooded. The full report tests whether any extent covered the exact spot.
2013-14 UK winter floods (2013, 40 warnings nearby) · Bert (2024, 12 warnings nearby) · Conall (2024, 11 warnings nearby) · Henk (2024, 6 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Wimborne | River Stour | 4.1 km | 1.26 m | 2.00 m |
| Throop | River Stour | 5.5 km | 1.20 m | 1.91 m |
| Ferndown Tricketts Cross | Uddens Water | 5.7 km | 1.48 m | 2.50 m |
| Walford Mill | River Allen | 6.3 km | 0.55 m | 1.11 m |
Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.
| Overflow | Discharges into | Distance | Spills | Hours |
|---|---|---|---|---|
| Wood Lane Ps | Freshwater(s) | 0.4 km | 24 (2024) | 65 |
| Pumping Station At Magna Road | Knighton Stream(trib.r.stour) | 1.3 km | 2 (2024) | 0 |
| Church Lane Pumping Station | River Stour | 2.6 km | 32 (2024) | 156 |
| Kinson Sewage Treatment Works | Lower River Stour(s) | 3.0 km | 37 (2024) | 406 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
8 mapped flood-defence assets within 500 m — nearest ~141 m (natural high ground). Defences reduce risk, never remove it.
The interactive flood-risk map with a building picker (your exact house, not the postcode), the 2050s climate view, surface-water and planning flood zones at your building, exact recorded-flood distances, year-by-year warning charts, watercourses including culverted streams, an insurance outlook with the Flood Re rules, and a printable document with every dataset receipt — start with the free preview, unlock for £19.
At-risk postcodes near BH11 9LG — all in the BH11 district.
© 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. Recorded Flood Outlines and warning history © Environment Agency copyright and/or database right 2025. Storm-overflow figures: EA Event Duration Monitoring. Flood defences © Environment Agency (OGL v3). This page summarises public area-level data — it is not a flood-risk survey and not a substitute for the official GOV.UK service. All data sources & licences. More postcodes: the BH11 district.