FloodRadar
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Hornsea, East Riding of Yorkshire
Up to Low likelihood
Properties in HU18 1RG 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 | 0 |
| 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.
HU18 1RG gets about 667 mm of rain a year on average (wettest month July, 71 mm; driest March, 40 mm). That is 43% 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), 2.4 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 8 m above sea level and falls 16 m across the surrounding 800 m. Surface water reaching this point runs off ground lying to the south-east, 9.9 m higher.
Because properties in the low likelihood band; 6 recorded flood outlines mapped nearby; 282 official warnings since 2006.
The map above shows the real EA rivers & sea likelihood cells around HU18 1RG. 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 |
|---|---|---|
| Feb 2020 | 2020 February Flood Incident - Storm Dennis | ~54.2 km |
| Feb 2020 | 2020 February Flood Incident - Storm Ciara | ~62.4 km |
| Nov 2019 | 2019 November Flood Incident | ~79.4 km |
| Jan 2017 | East Coast Tidal Event January 2017 | ~1.0 km |
| Jun 2007 | June 2007 Flood Event (Hull and East Riding) | ~8.7 km |
| Jun 2007 | 123JUN2007SW0003 | ~10.2 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.
Ashley (2024, 5 warnings nearby) · Ellen (2020, 4 warnings nearby) · Franklin (2022, 4 warnings nearby) · Darcy (2021, 4 warnings nearby)
| Gauge | River | Distance | Typical high | Highest on record |
|---|---|---|---|---|
| Hempholme PS | Roam Drain | 11.1 km | -0.26 m | 1.50 m |
| Lissett New Bridge | Barmston Main Drain | 12.5 km | 2.70 m | 4.00 m |
| Scurf Dyke | River Hull | 12.9 km | 3.49 m | 4.02 m |
| Scurf Dyke | Scurf Dyke | 12.9 km | 3.80 m | 4.63 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 |
|---|---|---|---|---|
| Hornsea Sps | North Sea | 1.4 km | 101 (2024) | 67 |
| Mappleton Sps | North Sea | 3.8 km | 64 (2024) | 177 |
| Atwick No.2 Stw | Trib Of Stream Dyke | 4.1 km | 193 (2024) | 3,493 |
| Bewholme Sewage Pumping Station | Unnamed Trib Of Stream Dike | 4.4 km | 0 (2024) | 0 |
Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.
6 mapped flood-defence assets within 500 m — nearest ~273 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 HU18 1RG — all in the HU18 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 HU18 district.