FloodRadar
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Southport, Sefton
Up to Very low likelihood
Properties in PR9 9TR sit in the Environment Agency's Very 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% | 0 | 0 |
| Very low | below 0.1% | 16 | 12 |
Over a 25-year mortgage, a property in a very low-likelihood area has less than a 3% chance of flooding at least once.
The ground here sits at about 5 m above sea level and falls 10 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the north-north-east, 6.1 m higher.
Because properties in the very low likelihood band; 1 recorded flood nearby; 53 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around PR9 9TR. 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 | Recorded flood | Approx. distance |
|---|---|---|
| Sep 2017 | Unnamed recorded flood | ~1.3 km |
EA Recorded Flood Outlines — absence of a record never proves a place has not flooded. The full report tests whether any extent covered the exact spot.
2013-14 UK winter floods (2013, 12 warnings nearby) · Ashley (2024, 2 warnings nearby) · Eunice (2022, 2 warnings nearby) · Fionn (2018, 2 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Castle Bridge Croston | River Yarrow | 12.1 km | 3.02 m | 4.10 m |
| Littlewood Bridge | River Lostock | 13.0 km | 2.70 m | 3.80 m |
| Croston | River Yarrow | 13.3 km | 1.30 m | 2.99 m |
| Wanes Blades | River Douglas | 13.4 km | 2.75 m | 3.80 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 |
|---|---|---|---|---|
| Southport Wwtw | Crossens Pool | 0.4 km | 9 (2024) | 43 |
| Balmoral Drive/north Road Cso | River Ribble | 1.0 km | 7 (2024) | 27 |
| O/s 1 Teversham Cso | Three Pools Waterway | 1.2 km | 20 (2024) | 22 |
| Outs119 Rufford Rd Cso 382pz | Three Pools Waterway | 1.2 km | 35 (2024) | 79 |
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 ~115 m (engineered high ground, embankment, 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 PR9 9TR — all in the PR9 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 PR9 district.