FloodRadar
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Up to High likelihood
Properties in BH19 3BA sit in the Environment Agency's High 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% | 1 | 0 |
| Medium | 1% – 3.3% | 0 | 0 |
| Low | 0.1% – 1% | 0 | 0 |
| Very low | below 0.1% | 0 | 0 |
Over a 25-year mortgage, a property in a high-likelihood area has at least a 57% chance of flooding at least once.
BH19 3BA gets about 870 mm of rain a year on average (wettest month November, 111 mm; driest May, 48 mm). That is 25% 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), 1.4 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 2 m above sea level and falls 10 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the south-west, 5.1 m higher.
Because properties in the high likelihood band; 542 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around BH19 3BA. 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.
None mapped within ~1 km of this postcode's centre.
No recorded outline near this postcode means no flood was mapped here, which is not evidence none happened: the Environment Agency mapped only some floods, mapping effort rose sharply after about 2000, and surface-water flooding is largely absent from this record. The full report tests every other flood source at the exact building.
2013-14 UK winter floods (2013, 57 warnings nearby) · Brendan (2020, 7 warnings nearby) · Ciaran (2023, 5 warnings nearby) · Ashley (2024, 5 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Swanage Prospect Farm Swan Brook | Swan Brook | 7.3 km | 0.65 m | 1.31 m |
| Swanage King Georges Field St Marys Church | Swan Brook | 7.7 km | 0.45 m | 0.55 m |
| BAGGS MILL | — | 12.2 km | — | — |
| Throop | River Stour | 12.3 km | 1.20 m | 1.91 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 |
|---|---|---|---|---|
| Sandbanks Pavilion Pumping Station | Poole Harbour | 1.5 km | 5 (2024) | 11 |
| Shore Road Ps Overflow | English Channel | 2.4 km | 42 (2024) | 43 |
| Wadmore Lane Pumping Station | Tributary Of Little Sea | 3.3 km | 3 (2024) | 5 |
| Coombe Pumping Station | Studland Bay(c) | 3.7 km | 3 (2024) | 5 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
1 mapped flood-defence asset within 500 m — nearest ~156 m (beach). 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 BH19 3BA — all in the BH19 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. 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 BH19 district.