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Does NG31 7AD flood?

Up to Low likelihood

Properties in NG31 7AD 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 bandAnnual chancePropertiesOf which homes
Highgreater than 3.3%00
Medium1% – 3.3%00
Low0.1% – 1%40
Very lowbelow 0.1%00

Over a 25-year mortgage, a property in a low-likelihood area has a 2–22% chance of flooding at least once.

The ground around NG31 7AD

The ground here sits at about 57 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-south-east, 10.3 m higher.

Shaded relief map of the ground around NG317AD, computed from Environment Agency LiDAR. The ground here sits at about 57 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-south-east, 10.3 m higher.
Shaded relief of the bare ground within about 400 m of NG31 7AD, computed from the Environment Agency's published LiDAR terrain survey. The ring marks the postcode centre, not a property. This shows the shape of the land, not a flood map — it does not include drains, culverts, walls or kerbs, and the official likelihood band above is the authoritative figure. © Environment Agency copyright and/or database right 2022. All rights reserved.
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Get the full flood report for NG31 7AD — £19 Free preview first · instant access · no account needed The detail below — flood history, warnings, rivers, overflows — is part of FloodRadar's property flood-risk report. The official band above is free; the preview shows more before you decide.

Inside the full report for NG31 7AD

FloodRadarProperty Flood-Risk Report
NG31 7AD
Moderate flood risk — investigate further

Because properties in the low likelihood band; 2 recorded floods nearby; 146 official warnings since 2006.

C Today — indicative grade (A best → E)
··· By the 2050s — EA climate scenario (in the full report)
⚑ Official warning within 10 km: Yes ⚑ Recorded flood nearby: Yes ⚑ Flood defences within 500 m: Yes ⚑ In flood zone 2 or 3: ···
Rivers & sea
Up to Low
Surface water
···
Groundwater
Not assessed
Historic flooding
Recorded nearby
Warning history · flood map with building picker · 2050s view · insurance outlook · every dataset receipt — 18 sections

Flood-risk map of this area

Environment Agency flood-likelihood cells
High (>3.3%/yr) Medium Low Very low Marker = postcode centre Base map © OpenStreetMap contributors

The map above shows the real EA rivers & sea likelihood cells around NG31 7AD. 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.

Official flood warnings near NG31 7AD

146
flood alerts & warnings within 10 km since 2007
19
of them full flood warnings or severe warnings
2026
most recent warning nearby (2026-02-28)

Warnings cover flood areas, not individual addresses.

Recorded floods near this postcode

DateRecorded floodApprox. distance
Jan 2025 LNA_2025_01_Fluvial_Grantham ~0.8 km
Jan 1922 LNA_1922_08_Grantham ~0.9 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.

Named storms that brought flooding here

2007 UK floods (2007, 9 warnings nearby) · 2013-14 UK winter floods (2013, 5 warnings nearby) · Babet (2023, 4 warnings nearby) · Dylan (2017, 2 warnings nearby)

The rivers that matter for NG31 7AD

GaugeRiverDistanceTypical highHighest on record
Saltersford River Witham 2.5 km 0.74 m 1.54 m
SALTERSFORD RAINGAUGE WITS — 2.6 km — —
Allington Foston Beck 5.8 km 0.85 m 1.83 m
ALLINGTON GS WITS — 5.9 km — —

Live levels, predictions and rain-response behaviour are on each gauge's page and in the property report.

Storm overflows within 5 km

OverflowDischarges intoDistanceSpillsHours
Grantham - Bridge End Grove Cso River Witham 1.6 km 2 (2024) 0
Manthorpe Mill Pumping Station Running Furrows Drain 3.0 km 61 (2024) 105
Great Gonerby Ps Running Furrows Drain River Wi 3.0 km 50 (2024) 358
Harlaxton Water Recycling Centre Trib Of Grantham Canal 3.0 km 51 (2024) 352

Official annual EDM figures — a water-quality signal for local watercourses, not a property flood-risk factor.

Flood defences

8 mapped flood-defence assets within 500 m — nearest ~69 m (natural high ground, engineered high ground). Defences reduce risk, never remove it.

What the full property report adds

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.

Flood risk at nearby postcodes

NG31 7AA up to Low NG31 7AB up to Low NG31 7AE up to Low NG31 7AJ up to Low NG31 7AL up to Low NG31 7AP up to Low NG31 7AQ up to Medium NG31 7AW up to Low NG31 7DA up to Low NG31 7DB up to Low NG31 7DD up to Low NG31 7EF up to Low

At-risk postcodes near NG31 7AD — all in the NG31 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 NG31 district.